PSLE At a sale, Neave bought 10 mugs of the same kind. His aunt bought 7 such mugs. She also bought 2 glasses at $7.60 each. Altogether, she spent $6.10 less than Neave. What was the total amount of money Neave and his aunt spent?
|
Neave |
His aunt |
Items bought
|
10 mugs
|
7 mugs + 2 glasses = 7 mugs + 15.20 |
Comparing the amounts paid |
$6.10 more |
|
Amount that his aunt spent on 2 glasses
= 2 x 7.60
= $15.20
Let the cost of 1 mug be 1 M.
If Neave spent $6.10 less, each would pay the same amount.
10 M - 6.10 = 7 M + 15.20
10 M - 7 M = 15.20 + 6.10
10 M - 7 M = 21.30
3 M = 21.30
1 M = 21.30 ÷ 3 = 7.10
Total amount that Neave and his aunt spent
= 10 M + 7 M + 15.20
= 17 M + 15.20
= 17 x 7.10 + 15.20
= 120.70 + 15.20
= $135.90
Answer(s): $135.90