During a charity drive, Primary 5 raised 5 times as much money as Primary 2 on the first week. On the second week, Primary 5 raised another $270 while Primary 2 raised another $474. During the entire charity event, Primary 5 raised 3 times as much as Primary 2. What was the total amount raised by Primary 5?
|
Primary 5 (1) |
Primary 2 (2) |
Make p the same (2) x 3 = (3) |
Before |
5 u |
1 u |
3 u |
Change |
+ 270 |
+ 474 |
+ 1422 |
After |
3 p |
1 p |
3 p |
(1) = (3)
5 u + 270 = 3 u + 1422
5 u - 3 u = 1422 - 270
2 u = 1152
1 u = 1152 ÷ 2 = 576
From (2)
1 p = 576 + 474 = 1050
Total amount raised by Primary 5
= 3 p
= 3 x 1050
= $3150
Answer: $3150