When a survey calls residential telephone numbers at random, only 40% of the calls reach a live person. You watch the random dialing machine make 20 calls.

(a) What is the probability that exactly 3 calls reach a person? (Use 3 decimal places.)

(b) What is the probability that 3 or fewer calls reach a person? (Use 3 decimal places.)

Which is an accurate comparison of the two data sets? the commute to work is typically shorter and more consistent than the commute home. the commute to work is typically shorter but less consistent than the commute home. the commute to work is typically longer and less consistent than the commute home. the commute to work is typically longer but more consistent than the commute home.