Question

and your while you have the following paper money 7 singles 352 tens + 620 is what is the probability of a fraction you would draw a 5 and then a 20

Answer 1

You have 7 ones

3 fives

2 tens

6 twenties

This is a total of 7+3+2+6 = 18 bills

First we want to know the probabilitity that you will draw a five

P(five dollar bill) = number of fives/ total = 3 / 18 = 1/6

Now we have 7 ones

2 fives

2 tens

6 twenties

This is a total of 7+2+2+6 = 17 bills left ( assuming you get to keep the bill)

Now we want to know the probability of getting a twenty dollar bill

P( twenty dollar bill) = number of twenties / total = 6/ 17

Multiply the probabilities together

1/6 * 6/17 = 1/17

The probability of getting a five and then a twenty is 1/17