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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?

The probability is 0.36 or 36%

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%.

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