Question

Blood types A, B, O, and AB have percentages 40%, 20%, 30% and 10%. If two individuals are chosen at random, assuming independence, how do you find probability that neither is of blood type A?

Answer 1

The probability is `0.36` or `36%`

Explanation:

The probability that one chosen person is off blood type `A` is `40%=0.4` so the probability that he is not of blood type `A` is `0.6`.
To calculate the probability that none of `2` people is of blood type `A` you have to multiply the probabilities:

`0.6xx0.6=0.36` or `36%`.