Question

you have four $1 bills,two $5 bills,five $10 bills,and five $20 bills in your wallet.You select a bill at random.Without replacing the bill,you choose a second bill.Find P($1,then $10).

Answer 1

There is 16 bills in total. The probability that you select a 1 dollar bill is 4/16. The probability that you select a 10 dollar boll is 5/16-1. Multiply 4/16 by 5/15 to find the answer. The answer is 1/12. This is the method for geometric probabilities.