Question

A wallet containing 5 five dollar bills, 7 ten dollar bills, and 8 twenty dollar bills is found and returned to its owner. The wallet's owner will reward the finder with 1 bill drawn randomly from the wallet. What is the probability that the bill drawn will be a twenty- dollar bill?

Answer 1

There are 5+7+8 = 20 total bills.

Out of these, 8 are twenty-dollar bills.

The probability of choosing 1 twenty-dollar bill is then 8/20, which simplifies to 2/5.

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