Question

(1) 45% of all voters support Proposition A. If a random sample of 10 voters is polled, what is the probability that exactly 4 of the voters support the proposition A?

Solution=

(2) Find the probability that a randomly selected worker with wage’s rate per hour is between $31 and $44 if the rate mean µ=$40 and standard deviation σ=5?

(Use positive and negative z-scores table)

Solution=

Solution:

Answer 1