Annie brought nickels, dimes and quarters to the store. If she has at least one of every coin, they add up to $1.00, and Annie has 15 coins total, what is the probability that one coin at random is a nickel? Lots of points, and will give brainliest! Please help!

She has 1 quarter, 1 dime and 13 nickels. So the probability that one coin at random is a nickel is 13/15.

My work:

1$= 100

1 quarter=25

1 dime=10

1+1+13= 15

25×1= 25

10×1= 10

5×13= 65

65+25+10= 100