Question

According to a recent poll, 80% of adults enjoy watching TV. Choose a group of 3 adults at random. The probability that all of them enjoy watching TV is: O a. 0.267 Ob. 0.512 c. 0.333 d. 2.400

Answer 1

B) 0.512

Explanation:

Use the binomial probability formula

`P(X=x)=C(n,x)p^xq^(n-x)\\P(X=3)=C(3,3)(0.80)^3(0.20)^0\\P(X=3)=(0.80)^3\\P(X=3)=0.512`

Therefore, B is the correct option.