17.There are 1200 respondants to a poll, each favoring their preference for
candidates A, B, and C. 54% favored A, 48% favored B, and 42% favored C, and
there is 30% favored both A and B. what’s the largest possible number of
respondants favoring C, but not C & b , nor C & A??作者: tongxun 时间: 2002-9-7 11:35