A certain famous Canadian tennis player makes a successful first serve 70% of the time. Assume that each serve is independent of the others. If she serves 6 times, what is the probability that at least one of these first serves will be in?

a. 0.9993

b. 0.0007

c. 0.9976

d. 0.0024

A certain famous Canadian tennis player makes a successful first serve 55% of the time. Assume that each serve is independent of the others. If she serves 6 times, what is the probability that at most one of these first serves will be in?

a. 0.9391

b. 0.0692

c. 0.0609

d. 0.9308