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Math Help - Piggybank

  1. #1
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    Piggybank

    A piggybank contains 2 quarters, 3 dimes, 4 nickels, and 5 pennies. One coin is removed at random. What is the probability that the coin is a dime or a nickel?
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  2. #2
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    Quote Originally Posted by symmetry View Post
    A piggybank contains 2 quarters, 3 dimes, 4 nickels, and 5 pennies. One coin is removed at random. What is the probability that the coin is a dime or a nickel?
    14 total coins;

    3 dimes

    4 nickels.

    Thus, the probability that it is a dime OR a nickel is 3/14 + 4/14 = 7/14, or 1/2.
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  3. #3
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    ok

    Your notes are greatly appreciated.
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