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miafy

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For one toss of a certain coin, the probability that the outcome is heads is 0.6.  If this coin is tossed 5 times, which of the following is the probability that the outcome will be heads at least 4 times?

 

(A) (0.6)^5

(B) 2(0.6)^4

(C) 3(0.6)^4(0.4)

(D) 4(0.6)^4(0.4) + (0.6)^5

(E) 5(0.6)^4(0.4) + (0.6)^5

答案是Ｅ