Question

12. A fruit basket contains oranges and grapefruits. One-third of the orange

and one-fourth of the grapefruits were spoiled. You threw away 4 oranges
and 7 grapefruits. How many pieces of fruit were in the basket?

Answer 1

There were 12 + 28 = 40 pieces of fruit in the basket.

Explanation:

Suppose there were x oranges and y grapefruit.

Then we have

1 /3 x = 4

x = 4*3 = 12.

1/4 y = 7

y = 7*4 = 28.