PSLE At a sale, Andy bought 10 mugs of the same kind. His cousin bought 8 such mugs. She also bought 4 bowls at $6.90 each. Altogether, she spent $8.20 more than Andy. What was the total amount of money Andy and his cousin spent?
|
Andy |
His cousin |
Items bought
|
10 mugs
|
8 mugs + 4 bowls = 8 mugs + 27.60 |
Comparing the amounts paid |
|
$8.20 more |
Amount that his cousin spent on 4 bowls
= 4 x 6.90
= $27.60
Let the cost of 1 mug be 1 M.
If Andy's cousin spent $8.20 less, each would pay the same amount.
10 M + 8.20 = 8 M + 27.60 - 8.20
10 M - 8 M = 27.60 - 8.20
2 M = 19.40
1 M = 19.40 ÷ 2 = 9.70
Total amount that Andy and his cousin spent
= 10 M + 8 M + 27.60
= 18 M + 27.60
= 18 x 9.70 + 27.60
= 174.60 + 27.60
= $202.20
Answer(s): $202.20