PSLE At a sale, Albert bought 7 wine glasses of the same kind. His sister bought 5 such wine glasses. She also bought 4 bowls at $5.70 each. Altogether, she spent $3.20 more than Albert. What was the total amount of money Albert and his sister spent?
|
Albert |
His sister |
Items bought
|
7 wine glasses
|
5 wine glasses + 4 bowls = 5 wine glasses + 22.80 |
Comparing the amounts paid |
|
$3.20 more |
Amount that his sister spent on 4 bowls
= 4 x 5.70
= $22.80
Let the cost of 1 wine glass be 1 W.
If Albert's sister spent $3.20 less, each would pay the same amount.
7 W + 3.20 = 5 W + 22.80 - 3.20
7 W - 5 W = 22.80 - 3.20
2 W = 19.60
1 W = 19.60 ÷ 2 = 9.80
Total amount that Albert and his sister spent
= 7 W + 5 W + 22.80
= 12 W + 22.80
= 12 x 9.80 + 22.80
= 117.60 + 22.80
= $140.40
Answer(s): $140.40