“I never teach my pupils; I only attempt to provide the conditions in which they can learn.” ~ ALBERT EINSTEIN
扑克牌题型。从52张扑克牌中,任意取出2张牌,求以下的概率:
a. 两张都是梅花,
b. 两张都是人头,
c. 两张都是K牌,
d. 两张中各有人头及数字一张
e.
第二张是葵花K
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