Homework Help: math

Posted by mythreyee on Monday, December 10, 2012 at 6:34pm.

natalie has a change purse full of coins. she has 13 pennies, 15 dimes and 22 nickles. if she takes a coins out of her purse, without looking, the probability that it will be a penny is ----------- out of ------------

math - Damon, Monday, December 10, 2012 at 6:36pm
she has sum = 13 + 15 + 22 coins
so
13/sum

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