ose is paying for a $6meal using bills in his wallet. He has four 1$ bills, three 5$ bills, and two10$ bills. If he selects two bills at random, one at a time from his wallet, what is the probability that he will choose a 1$ bill and a 5$ bill to pay for the meal? Show your work.

Question

ose is paying for a  $6meal using bills in his wallet. He has four 1$ bills, three 5$ bills, and two10$ bills. If he selects two bills at random, one at a time from his wallet, what is the probability that he will choose a 1$ bill and a 5$ bill to pay for the meal? Show your work.

across · Answer

The guy has a total of 9 bills:

4 bills of $1
3 bills of $5
2 bills of $10

The probability of choosing any of those is as follows:

4/9 for $1
3/9 for $5
2/9 for $10

The probability that he will choose a $1 bill and a $5 bill is as follows:

4/9 * 3/8 = 1/6

I suck at statistics though. You should wait for someone else to corroborate this.