67.  An equity manager conducted a stock screen on 5,000 U.S. stocks that comprise her
investment universe. The results of the screen are presented in the table below.

Criterion                                            % of Stocks
                                                        Meeting Criterion
Price per share/Sales per share  <1.25    35.0
Total asset/Equity ≤ 2.5                      48.2
Dividends >0                                      58.6
Consensus forecast EPS >0                   75.0
Meeting all 4 criteria simultaneously        10.8

If all the criteria were completely independent of each other, the number of stocks
meeting all four criteria would be closest to:
A.  293.
     B.  371.
     C.  540.  

为什么计算“the number of stocks meeting all four criteria ”用的是0.35 x 0.482 x 0.586 x 0.75 = 0.074或7.4%，而不能用表格中直接给出的10.8%。两者的区别究竟在哪里？请牛牛们指点一下