SOLUTION: A jar contains 17 one dollar bills and 8 five dollar bills. A. If you reach in and grab two bills without looking what is the probability that both are one dollar bills? B. I

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Question 1178539: A jar contains 17 one dollar bills and 8 five dollar bills.
A. If you reach in and grab two bills without looking what is the probability that both are one dollar bills?
B. If your reach in and grab two bills without looking, what is the probability that you get one of each bill.
Explain your answers
Found 2 solutions by ikleyn, ewatrrr:
Answer by ikleyn(52790) About Me  (Show Source):
You can put this solution on YOUR website!
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Just solved and answered under this link

https://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.1178535.html


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Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi
 jar contains  25 bills: 17 one dollar bills and 8 five dollar bills
grab two bills
P(2 ones) = 17C2/25C2= 136/300 = .4533   | = %28n%21%29%2Fx%21%28n+-+x%29%21+=+17%21%2F%28%282%21%29%2815%21%29%29+=+17%2A8+=+136%29 
P(I OF EACH) = (17C1)(8C1)/(25C2) = 17*8/300 = 136/300 = .4533

Had the numbers been:  25   16 one dollar bills and 9 five dollar bills:
P(20nes) = 16C2/300 = 120/300  |16C2 = 8*15
P(I OF EACH) = 16*9/300 = 144/300
IN the previous case:  numerator in both cases = 136
Wish You the Best in your Studies.