Question

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

Answer 1

Answer:correct answer is 1/12

Explanation:

Answer 2

You have 9 bills all in all in your wallet. From the probability , P($10 then $1), you are to pick $10 bill first out of the 9. The probability of doing so is 2/9. Then you have 8 bills left. The probability of picking $1 is 3/8. The final probability is the product of the two probabilities. The answer is therefore, (2/9) x (3/8) or equal to 1/12.