It's getting hotter and hotter, and mother asks Xiaoming to go shopping to buy watermelons. The price tag in front of the watermelon stall is: per kilogram 1 yuan selected by the boss and 65438+ per k

It's getting hotter and hotter, and mother asks Xiaoming to go shopping to buy watermelons. The price tag in front of the watermelon stall is: per kilogram 1 yuan selected by the boss and 65438+ per kilogram selected by himself. There are three schemes.

Suppose these three watermelons have a, b and c kilograms respectively.

Then a =10 * 8/20 = 4kgb =10 * 7/20 = 3.5g.

C = 10 * 5/20 = 2.5kg。

Scheme 1. Raw food is a kind of food.

The actual unit price is 0.7 *10/(3.5+2.5) = 7/6 >; 1 loss.

Option 2. B it's not ripe and can't be eaten.

The actual unit price is 0.7 *10/(4+2.5) = 7/6.5 >; 1

suffer wastage

Option 3. C is not ripe and can't be eaten.

The actual unit price is 0.7 * 10/(4+3.5) = 7/7.5.

Don't suffer