PSLEThere were a total of 186 tables and chairs in a basketball court. There were 2 times as many chairs as tables. After 24 chairs and some tables were thrown away, there were 4 times as many chairs as tables left. How many tables were thrown away from the basketball court?
|
Tables |
Chairs |
Total |
Before |
1 u |
2 u |
186 |
Change |
- ? |
- 24 |
|
After |
1 p |
4 p |
|
Number of tables and chairs at first
= 2 u + 1 u
= 186
3 u = 186
1 u = 186 ÷ 3 = 62
Number of chairs at first
= 2 u
= 2 x 62
= 124
Number of chairs left
= 124 - 24
= 100
4 p = 100
1 p = 100 ÷ 4 = 25
Number of tables thrown away from the basketball court
= 62 - 25
= 37
Answer(s): 37