Whats the total value of the coins?
Ed has 20 coins. 20% are quarters, 30% are dimes
and the rest are nickles...
20 * 0.2 = 4 quarters
20 * 0.3 = 6 dimes
20 - 4 - 6 = 10 nickels
4 * 0.25 = $1.00
6 * 0.10 = $0.60
10 * 0.05 = $0.50
$1.00 + $0.60 + $0.50 = $2.10