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OpenStudy (anonymous):
A bag of coins contains 2 quarters, 5 dimes, 3 nickels, and 4 pennies. If 2 coins are randomly chosen from the bag, one after the other, and not replaced, and if the total value of the chosen coins is 26 cents, what is the probability that a third coin randomly chosen from the bag will be a penny?
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OpenStudy (johnweldon1993):
Okay, well after only choosing 2 coins...that means it MUST have been 1 quarter and 1 penny right? 25 + 1 = 26 this leaves you with 1 quarter, 5 dimes, 3 nickels, and 3 pennies so 12 coins total are left...the probability that you choose a penny is...?
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