PSLE At a sale, Vincent bought 9 bowls of the same kind. His sister bought 7 such bowls. She also bought 3 mugs at $5.20 each. Altogether, she spent $5.40 more than Vincent. What was the total amount of money Vincent and his sister spent?
|
Vincent |
His sister |
Items bought
|
9 bowls
|
7 bowls + 3 mugs = 7 bowls + 15.60 |
Comparing the amounts paid |
|
$5.40 more |
Amount that his sister spent on 3 mugs
= 3 x 5.20
= $15.60
Let the cost of 1 bowl be 1 B.
If Vincent's sister spent $5.40 less, each would pay the same amount.
9 B + 5.40 = 7 B + 15.60 - 5.40
9 B - 7 B = 15.60 - 5.40
2 B = 10.20
1 B = 10.20 ÷ 2 = 5.10
Total amount that Vincent and his sister spent
= 9 B + 7 B + 15.60
= 16 B + 15.60
= 16 x 5.10 + 15.60
= 81.60 + 15.60
= $97.20
Answer(s): $97.20