PSLE At a sale, Mark bought 8 cups of the same kind. His cousin bought 6 such cups. She also bought 4 bowls at $7.60 each. Altogether, she spent $15.80 more than Mark. What was the total amount of money Mark and his cousin spent?
|
Mark |
His cousin |
Items bought
|
8 cups
|
6 cups + 4 bowls = 6 cups + 30.40 |
Comparing the amounts paid |
|
$15.80 more |
Amount that his cousin spent on 4 bowls
= 4 x 7.60
= $30.40
Let the cost of 1 cup be 1 C.
If Mark's cousin spent $15.80 less, each would pay the same amount.
8 C + 15.80 = 6 C + 30.40 - 15.80
8 C - 6 C = 30.40 - 15.80
2 C = 14.60
1 C = 14.60 ÷ 2 = 7.30
Total amount that Mark and his cousin spent
= 8 C + 6 C + 30.40
= 14 C + 30.40
= 14 x 7.30 + 30.40
= 102.20 + 30.40
= $132.60
Answer(s): $132.60