Assuming that the murderer is in the following class, and that our data on the blood types of its members (below) is accurate and complete, the probability that the crime scene blood would be type A if someone other than the person of interest is the murderer is 1 in . . .

1 in 4

Explanation:

it is 1 in 4 because according to research we have four standard blood groups the A,B, AB and O

The probability of the murderer being among the blood samples of the members of the class is 0.25.

Explanation:

Since the limits of any probability is between 0 and 1, and we have four blood groups  A,B, AB and O. The probability that murderer is in the following class  of the four groups of the blood samples and that our data on the blood types of its members is accurate and complete.

∴ P(M) = 1/4 =0.25

Therefore, the probability of the murderer being among the blood samples of the members of the class is 0.25

true