SOLUTION: There are four nickels and seven dimes in your pocket. One of the nickels and one of the dimes are Canadian. The others are US currency. You randomly select a coin from your pocket

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Question 1181040: There are four nickels and seven dimes in your pocket. One of the nickels and one of the dimes are Canadian. The others are US currency. You randomly select a coin from your pocket. It is a dime or is Canadian currency. Find the probability of this occurring.
Answer by greenestamps(13216) About Me  (Show Source):
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There are 4+7=11 coins to choose from.

Seven are dimes, including the one Canadian dime; and there is one Canadian nickel. That makes 8 coins that are either a dime or Canadian.

The probability is therefore 8/11.