It is estimated that one third of the general population has blood type a a sample of six people is selected at random. what is the probability that exactly three of them have blood type a?

0.2195

Step-by-step explanation:

Binomial distribution formula :-

, where P(x) is the probability of x successes in the n independent trials of the experiment and p is the probability of success.

Given : The probability of that the general population has blood type A =

Sample size : n=6

Now, the probability that exactly three of them have blood type A is given by :-

Therefore, the probability that exactly three of them have blood type A = 0.2195

the answer would be 1 1/72

step-by-step explanation:

you can rewrite the equation by separating the parts and then solving individually:

10-9=1

1/8 - 1/9=

find l c d and then combine:

1 1/72