Well if its american currency,
This is how much one of each weighs
(1lb is approx 448Grams, all quantities in the table below are rounded up)
Penny 2.5gm (180 pennies = full pound)
Nickel 5gm (90 nickels = full pound)
Dime 2.27gm (198 dimes = full pound)
Quarter 5.67gm (80 quarters = full pound)
If the distribution is random by quantity then there will be approx the same amount of each coin, so approimately 29 of each type of coin.
(this would equate to just under 1 pound) any single additional coin would bring this to more than 1 pound
You would have $11.89 (since this is random .. your range is + or minus a buck
To distribution is random by weight.. figure 4 pounds (1 pound of each coin is worth $46.10, Divided by 4 gives us aprox $11.53 ... so range for this is + or - a buck
So, My guess based upon the info given would be $11.75