According to a recent survey, 31 percent of the residents of a certain state who are age 25 years or older have a bachelor's degree. A random sample of 50 residents of the state, age 25 years or older, will be selected. Let the random variable B represent the number in the sample who have a bachelor's degree. What is the probability that B will equal 40 ?
A (50 40)(0.31)^40(0.69)^10
B (50 40)(0.69)^40(0.31)^10
C (40 10)(0.31)^40(0.69)^10
D (40 10)(0.69)^40(0.31)^10
E 40(0.31)^50