A store finds that 65% of its customers pay with a credit card. If 3 customers check out, find the probability that all three of them use credit cards.
(Give your answer in the form of a decimal, to at least three digits after the decimal point.)
If 65 out of a 100 customers pay with a credit card, then you got for each customer 65% chance that he or she will pay with a credit card. But if you have three customers, that chance is devided by 3. So then you get 21,667 %.
