Question

80 pineapples at 15.25 each
3 pineapple got rotten, sold the rest at 20.00 each
amount of gain​

Answer 1

Answer:

Let the number of pineapples and watermelons be x and y respectively.

Then, 7x+5y=38 or 5y=(38−7x) or y=

5

38−7x

.

Clearly, y is a whole number, only when (38−7x) is divisible by 5.

This happens when x=4.