SOLUTION: Math's
A jar contains 10 coins: 3 pennies, 2 nickels, 4 dimes, and 1 quarter. Two coins are selected at random from the jar with replacement (the coin is pulled, looked at, the
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A jar contains 10 coins: 3 pennies, 2 nickels, 4 dimes, and 1 quarter. Two coins are selected at random from the jar with replacement (the coin is pulled, looked at, the
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Question 1194376: Math's
A jar contains 10 coins: 3 pennies, 2 nickels, 4 dimes, and 1 quarter. Two coins are selected at random from the jar with replacement (the coin is pulled, looked at, then put back in the jar.) Find the probability that neither coin selected is a penny. You should write your answer as a decimal. Answer by math_tutor2020(3817) (Show Source):
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There are 10 coins and 3 pennies.
That means there are 10-3 = 7 coins that aren't pennies.
Or you could say: 2 nickels + 4 dimes + 1 quarter = 7 coins that aren't pennies.
Getting two coins that aren't pennies has the probability of:
(7/10)*(7/10) = 49/100 = 0.49
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