Answer: 24 dimes and 12 nickels
Since a dime is equal to .10 and each nickel is worth .05, and there is double the amount of dimes then we can conclude that if we had 1 collection of all then we would have 2 dimes and a nickel, or .25. So now we divide 3.00 by 0.25 and get 12, now since there is 2 dimes in per 1 nickel we multiply this by 2 and get 24.