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標題:

Probabilities thanks

發問:

1. In a restaurant, three suppliers A, B and C supply 42%,33% and 25% of eggs respectively, Supplier A has 2.5% deteriorate, B has 3.2% and C has 4.4%. If an egg selected randomly from the restaurant that is found to be deteriorate, what is the probability that it is from A.2. In a school, there are 360 boys... 顯示更多 1. In a restaurant, three suppliers A, B and C supply 42%,33% and 25% of eggs respectively, Supplier A has 2.5% deteriorate, B has 3.2% and C has 4.4%. If an egg selected randomly from the restaurant that is found to be deteriorate, what is the probability that it is from A. 2. In a school, there are 360 boys and 540 girls, and 48% of boys and 52% of girls are wearing glasses. If a student chosen randomly from the school is wearing glasses. Find the probability that it is a boy.

最佳解答:

1. The required prob. is :(0.42*0.025)/(0.42*0.025+0.33*0.032+0.25*0.044)= 75/229 2. The required prob is :(360*0.48)/(360*0.48+540*0.52)= 8/21

其他解答:6A560DB68EC65D60