选择题：调查某单位得知。购买空调的占15％，购买电脑占12％，购买DVD的占20%；其中购买空调与电脑占6%

题目内容：

调查某单位得知。购买空调的占15％，购买电脑占12％，购买DVD的占20%；其中购买空调与电脑占6%，购买空调与DVD占10%，购买电脑和DVD占5％，三种电器都购买占2％。求三种电器都没购买的 A A.0.72
B B.0.3687
C C.0.29
D D.0.25

参考答案：

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