Kayla,
5 dimes and 2 quarters
total 7 coins
probability of selecting 1 dime is 5/7
probability of selecting 2 dimes is 5/7 * 4/6 = 20/42 = 10/21
probability of selecting 4 dimes is 5/7 * 4/6 * 3/5 * 2/4 = 120/840 = 1/7
Kayla P.
asked 05/15/19Assume that you select 4 coins at random from 7 coins: 5 dimes and 2 quarters.
What is the probability that all of the coins selected are dimes? Enter your answer as a fraction
Kayla,
5 dimes and 2 quarters
total 7 coins
probability of selecting 1 dime is 5/7
probability of selecting 2 dimes is 5/7 * 4/6 = 20/42 = 10/21
probability of selecting 4 dimes is 5/7 * 4/6 * 3/5 * 2/4 = 120/840 = 1/7
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