marias penny bank is 1/2 full. after she removes 120 pennies, it is 1/3 full. how many pennies can marias bank hold

720 pennies

Step-by-step explanation:

Initially the Penny bank is 1/2 full

After removing 120 pennies it is 1/3 full;

Therefore. the fraction equivalent to 120 pennies is;

1/2 - 1/3 = 1/6

Thus; Assuming the number of pennies that the penny bank can hold when full is x; then;

1/6 of x = 120

x = 120 * 6

= 720 pennies

Hence, when the penny bank is full it can hold 720 pennies.

720 pennies

Step-by-step explanation:

The difference between the fraction originally contained in the bank (1/2) and the fraction that remains after Maria removes 120 pennies (1/3) represents the fraction occupied by the 120 pennies.

Therefore the fraction occupied by the 120 pennies = 1/2-1/3=1/6

thus if 1/6 of the bank can hold 120 pennies, then, when full it holds 120*6/1=720 pennies