Answer:
Each customer bought 45 boxes which is equivalent to mangoes 3240 in total.
Explanation:
1. Subtract 3 boxes from the total of 138 imported boxes. ( 3 boxes are the 72 mangoes for his friends )
2. Divide 135 by 3 ( The amount of customers ) = 45 boxes per customer.
3. 45 x 24 ( The amount of mangoes in each box ) = 1080
4. 45 boxes/1080 mangoes per customer.
To recheck:
1080 x 3 ( The amount of customers again ) = 3240.
135 x 24 ( The amount of mangoes per box ) = 3240.
I Hope this helped! :)