Question

There are five nickels and seven dimes in your pocket. four of the nickels and six of the dines 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?
AND ITS SUPPOSED TO BE A FRACTION​

Answer 1

There is a 4/12 or 1/3 percent that I would get a Canadian currency nickel and a 1/12 percent that it would be a USA nickel. For how I got the 4/12 fraction, I just add all the coins together and see how much nickels are from Canadian currency and then that will be the fraction. Since there is only one nickel that is from USA out of 12, then it‘ll be 1/12 as the fraction.