SOLUTION: The fountain contains 20 pennies and 9 dimes. A coin is randomly taken and not replaced. A second coin is randomly taken. What is the probability that both coins are pennies?
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Question 1078735: The fountain contains 20 pennies and 9 dimes. A coin is randomly taken and not replaced. A second coin is randomly taken. What is the probability that both coins are pennies? Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! 29 coins.
probability first is a penny is 20/29. After that the next one is a penny with 19/28 probability. The joint probability is their product, 380/812 or 95/203=0.468
