A shopkeeper bought 138 boxes of apples each containing 24 apples. He could sell only 117 ¾ boxes of apples on the first day. How many apples are left with him ?

Correct option is A

The shopkeeper bought a total of 138 boxes x 24 apples/box = 3312 apples.
On the first day, he sold 471/4 boxes x 24 apples/box = 2826 apples.
Therefore, he is left with 3312 apples - 2826 apples = 486 apples.