According to data from the state blood program,40 percent of all individuals have group A blood.If six individuals give blood,find the probability that exactly three of the individuals have group A blood.
A).4000
B).2765
C).5875
D).0041

Question

Quizplus · Accepted Answer

The probability of an individual having group A blood is 0.4. The probability of an individual not having group A blood is 0.6. The probability of exactly three individuals having group A blood is given by the binomial distribution:P(X = 3) = (6 choose 3) * (0.4)^3 * (0.6)^3 = 0.2765Therefore, the correct answer is B.

According to Data from the State Blood Program,40 Percent of All