Answer to Question #327578 in Statistics and Probability for Khaita

Question

Question 2 [25]

Suppose that the latest census indicates that for every 10 young people available to work only 4 are

employed. Suppose a random sample of 20 young graduates is selected.

Required:

a) What is the probability that they are all employed?

b) What is the probability that none of them are employed?

c) What is the probability that at least four are employed?

d) What is the probability that at most fifteen are employed?

e) What is the probability that the number of young graduates who are employed is greater than

ten but less than fifteen?

f) What is the expected number of graduates who are not employed?

g) What is the standard deviation for the number of graduates who are not employed?