今天是：2025年4月4日 星期五
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Exercises 1-3 4
题目

There are playing cards in a deck . Sampling without replacement, one card at a time, consecutive cards, find the probability that the four cards have different suits.
解析

Solution: According to the question, the total number of basic events is , and the event

Four cards of different suits ,

Then according to the combination formula and the multiplication principle , the total number of basic events is

,

Finally, according to the classical summary formula , the probability of event occurring can be obtained as

.

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