What is the probability that the persons blood group is ab

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Problem

Fifteen persons reporting to a Red Cross center one day are typed for blood, and the following counts are found:

Blood group

O

A

B

AB

No.of persons

3

5

6

1

If one person is randomly selected, what is the probability that this person's blood group is: AB? Give exact answer in terms of fractions.

Reference no: EM131805617

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