Simple math problem here! :)
You add.
6 + 15 = 21 coins.
But, if you meant how much money do they have total the answer would be as followed.
1 quarter = 25 cents
So 6 * .25 = 1.50
(1 dollar and 50 cents)
1 penny = 1 cent
So 1*15 = 15.
Now you add!
1.50 + 15 = 1.65
(1 dollar and 65 cents.)
Hope this helps. c:
