math question help

Question

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There are five nickels and seven dimes in your pocket. Four of the nickels and six of the dimes are Canadian. The others are US currency. You randomly select a coin from your pocket. What is the probability it is a nickel or it is Canadian currency?

Answer 1

5 nickels and 7 dimes in your pocket

4 nickles and 6 dimes are Canadian

1 nickel and 1 dime are US currency

pick a coin randomly. What is the probability it's Canadian currency

(4+6)/(5+7) = 10/12 = 5/6 chance