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2 thoughts on “china fashion wholesale jewelry Guess the front and back of a coin randomly, what is the chance of guessing the mistakes within four times?”
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china fashion wholesale jewelry
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wholesale beach costume jewelry The probability of the first time in the first guess is 1/2, the probability of the second time is 1/4, the probability of the third time is 1/8, the probability of 1/16 is added together. The probability of guessing within 4 times is 15/16
wholesale jewelry packaging box Seeking the probability of guessing the right within four times, the probability of guessing the wrong four times, and the probability of minusing this with the total 1 can be 1- (1/2)^4 = 1-1/16 = 15 / The probability of guessing the right inner guessing in 16 times is the probability of guessing wrong in 1-5 times, that is, 1- (1/2) ＾ 5. As long as the total probability of minusing the wrong guess every time is enough, that is, 1- (1/2)^n