PSLE At a sale, Bobby bought 8 bowls of the same kind. His friend bought 5 such bowls. She also bought 4 wine glasses at $7.80 each. Altogether, she spent $15.30 more than Bobby. What was the total amount of money Bobby and his friend spent?
|
Bobby |
His friend |
Items bought
|
8 bowls
|
5 bowls + 4 wine glasses = 5 bowls + 31.20 |
Comparing the amounts paid |
|
$15.30 more |
Amount that his friend spent on 4 wine glasses
= 4 x 7.80
= $31.20
Let the cost of 1 bowl be 1 B.
If Bobby's friend spent $15.30 less, each would pay the same amount.
8 B + 15.30 = 5 B + 31.20 - 15.30
8 B - 5 B = 31.20 - 15.30
3 B = 15.90
1 B = 15.90 ÷ 3 = 5.30
Total amount that Bobby and his friend spent
= 8 B + 5 B + 31.20
= 13 B + 31.20
= 13 x 5.30 + 31.20
= 68.90 + 31.20
= $100.10
Answer(s): $100.10