某项目组织5位专家进行产品需求量预测，预测数据见下表。则需求量预测的期望值是（　　）万件。需求量预测数据<table style="BORDER-COLLAPSE: collapse" border="1" cellspacing="0" cellpadding="0"><tbody><tr style="HEIGHT: 54.05pt"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; HEIGHT: 54.05pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" valign="top" width="114"><table cellspacing="0" cellpadding="0" width="100%"><tbody><tr><td style="BORDER-BOTTOM: rgb(255,255,255); BORDER-LEFT: rgb(255,255,255); BACKGROUND-COLOR: transparent; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: rgb(255,255,255)">专家</td></tr></tbody></table><table cellspacing="0" cellpadding="0" width="100%"><tbody><tr><td style="BORDER-BOTTOM: rgb(255,255,255); BORDER-LEFT: rgb(255,255,255); BACKGROUND-COLOR: transparent; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: rgb(255,255,255)">概率%</td></tr></tbody></table><table cellspacing="0" cellpadding="0" width="100%"><tbody><tr><td style="BORDER-BOTTOM: rgb(255,255,255); BORDER-LEFT: rgb(255,255,255); BACKGROUND-COLOR: transparent; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: rgb(255,255,255)">需求量</td></tr></tbody></table></td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; HEIGHT: 54.05pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">35</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; HEIGHT: 54.05pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">45</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.25pt; PADDING-RIGHT: 5.4pt; HEIGHT: 54.05pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">58</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.25pt; PADDING-RIGHT: 5.4pt; HEIGHT: 54.05pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">68</td></tr><tr><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">1</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">10</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">20</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.25pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">40</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.25pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">30</td></tr><tr><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">2</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">10</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">30</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.25pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">30</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.25pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">30</td></tr><tr><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">3</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">30</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">20</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.25pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">20</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.25pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">30</td></tr><tr><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">4</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">20</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">20</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.25pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">50</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.25pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">10</td></tr><tr><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">5</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">0</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.2pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">40</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.25pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">60</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: rgb(255,255,255); PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 85.25pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: rgb(255,255,255); BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="114">0</td></tr></tbody></table>