How many coins do I have?

I have pennies, quarters, dimes in my piggy bank. If the total number of coins is 4 and the total value is 61¢. How many of each coin do I have?

As its mentioned I have pennies, quarters and dimes.. there should be one of each.
i.e; 1+25+10 = 36¢ and number of coins is 3
Remaining is 61-36=25¢ and there can be only one coin. 
So the last coin should be a quarter.

I have 1 penny, 2 quarters and 1 dime.