The records of a fancy shoe store show that 60% of customers making a purchase pay by credit card. Suppose 10 customers purchased shoes from the store yesterday morning.

i. What is the probability that at most three customers paid by credit card?

A 0.055 B 0.012 C 0.988 D 0.945

ii. What is the expected number of purchases made by credit card?

A 6 B 4 C 60 D 8

WHICH ANSWER IS CORRECT FOR i and ii?