What is the probability of at least 3coins with the same side up Throw 5coins up in the air.What is the probability(可能性) of at least 3coins with the same side up

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What is the probability of at least 3coins with the same side up
Throw 5coins up in the air.What is the probability(可能性) of at least 3coins with the same side up

向空中抛5枚硬币,至少有3枚硬币同一面朝上的概率是多少?
答案是1吧.