Step-by-step explanation:
Let the no. of quarters be x
Then no. of nickels = 72-x
Total value of the quarters present in the jar
=$ 0.25x
Total value of the nickels present in the jar
=$ 0.05(72-x)
Total value of the coins = $12.60
0.25x+0.05(72-x)= 12.60
0.25x + 3.6-0.05x= 12.60
0.2x= 12.60-3.6
0.2x= 9
x=9/0.2
x= 45
Therefore, the jar contains 45 quarters and
the jar contains =72-45= 27 nickels
