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Science,English,and math Ⅱ

No.142　18/02/12 09:49
燻し銀三 ( 50代 ♂ Oe38xe ) あ+あ-

『Supplementation』

A jet plane has several pairs of engine. As long as at least either of one of the engines functions,without falling down on the ground the jet plane can manage to go on flying. It is designed like that. That is why the more engine,the safer the jet plane,though it doesn't always mean that it doesn't drop on the ground,I'm sure.

【An untrustworthy intuition.】

《There is a class composed of 40 students. The probability that a student’s birthday is same with other one is 89%.》

When thinking over the probability on an issue,an expectation with an intuition is sometimes far different from other answer with a study of theory on the probability. It may be that then the significance of the theory on the probability is large. It is a question on a birthday that we often adopt its instance.

Let's suppose there was a class composed of 40 students,and we bet on whether or not a student’s birthday is same with other one. I'm going to study the question with the probability.