Science,English,and math 4th

No.185　21/03/29 10:48
燻し銀三 ( 60代 ♂ IJ7P0b ) あ+あ-

《Hideyoshi has a marvelous mathematical sense》

『Supplementation. A way of seeking the probability of having the same birthday in forty people』

In the next, multiplying each of the probability one by one each other, and its value is 0.1087, and it’s the probability that none of them have the same birthday in forty people.

As a result, the probability that having the same birthday in forty people is 1−0.1087 = 0.8912, so it’s about 89%.

To my sorrow, I can understand why it is. Could someone kind please tell me why?

I think Arabian number is by far better than English this time.

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