试题与答案

(本小题满分12分)美国次贷危机引发全球金融动荡,波及中国沪深两大股市,甲、乙、

题型:解答题

题目:

(本小题满分12分)美国次贷危机引发全球金融动荡,波及中国沪深两大股市,甲、乙、丙3人打算趁股市低迷之际买入股票。三人商定在圈定的10只股票中各自随机购买1只(假定购买时,每只股票的基本情况完全相同)

(1)求甲、乙、丙3人恰好买到相同股票的概率;

(2)求甲、乙、丙3人中至少有2人买到相同股票的概率.

答案:

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