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21 February, 22:32

Kevin had 6 nickles and 4 dimes in his pocket. If he took out one count and then a second coin without replacing the first coin-

what is the probability that both coins were nickels?

what is the probability that both coins were dimes?

what is the probability that the first coin was a nickel and the second a dime?

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  1. 21 February, 23:15
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    To find each probability you will state the probability of the first event happening and multiply it by the chance of the second event happening.

    P (2 Nickels) : 6/10 x 5/9 = 30/90 (1/3 chance)

    P (2 Dimes) : 4/10 x 3/9 = 12/90 (4/30 chance)

    P (1 nickel and 1 dime) : 6/10 x 4/9 = 24/90 (8/30 chance)
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