PSLE At a sale, Reggie bought 11 cups of the same kind. His sister bought 8 such cups. She also bought 4 wine glasses at $2.20 each. Altogether, she spent $20.30 less than Reggie. What was the total amount of money Reggie and his sister spent?
|
Reggie |
His sister |
Items bought
|
11 cups
|
8 cups + 4 wine glasses = 8 cups + 8.80 |
Comparing the amounts paid |
$20.30 more |
|
Amount that his sister spent on 4 wine glasses
= 4 x 2.20
= $8.80
Let the cost of 1 cup be 1 C.
If Reggie spent $20.30 less, each would pay the same amount.
11 C - 20.30 = 8 C + 8.80
11 C - 8 C = 8.80 + 20.30
11 C - 8 C = 29.10
3 C = 29.10
1 C = 29.10 ÷ 3 = 9.70
Total amount that Reggie and his sister spent
= 11 C + 8 C + 8.80
= 19 C + 8.80
= 19 x 9.70 + 8.80
= 184.30 + 8.80
= $193.10
Answer(s): $193.10