PSLE At a sale, Ahmad bought 7 mugs of the same kind. His friend bought 4 such mugs. She also bought 4 cups at $7.40 each. Altogether, she spent $0.80 more than Ahmad. What was the total amount of money Ahmad and his friend spent?
|
Ahmad |
His friend |
Items bought
|
7 mugs
|
4 mugs + 4 cups = 4 mugs + 29.60 |
Comparing the amounts paid |
|
$0.80 more |
Amount that his friend spent on 4 cups
= 4 x 7.40
= $29.60
Let the cost of 1 mug be 1 M.
If Ahmad's friend spent $0.80 less, each would pay the same amount.
7 M + 0.80 = 4 M + 29.60 - 0.80
7 M - 4 M = 29.60 - 0.80
3 M = 28.80
1 M = 28.80 ÷ 3 = 9.60
Total amount that Ahmad and his friend spent
= 7 M + 4 M + 29.60
= 11 M + 29.60
= 11 x 9.60 + 29.60
= 105.60 + 29.60
= $135.20
Answer(s): $135.20