# Probability

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In her wallet, Susan has 12 bills. 6 are $1 bills, 2 are $5 bills, 3 are $10 bills, and 1 is a $20 bill. She passes a volunteer seeking donations for the American Red Cross and decides to select 1 bill at random. Determine:

a. probability she selects $ 5 bill (my ans: 1/5)

b. probability she does not select a $5 bill (my ans: 5/6)

c. the odds in favor of her selecting the $5 bill (my ans: 1:5)

d. the odds against her selecting the $5 bill (my ans: 5:1)

e. the odds in favor of her selecting a $10 bill

f. the odds against her selecting a $20 bill

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##### Solution Summary

The probabilities of selecting bills from a bag are calculated.

##### Solution Preview

a. Ans:1/6. since there are 2 $5 bills. The probability of selecting one of the two $5 is 1/12. The ...

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