PSLEThere were a total of 148 tables and chairs in a basketball court. There were 3 times as many chairs as tables. After 26 chairs and some tables were thrown away, there were 5 times as many chairs as tables left. How many tables were thrown away from the basketball court?
|
Tables |
Chairs |
Total |
Before |
1 u |
3 u |
148 |
Change |
- ? |
- 26 |
|
After |
1 p |
5 p |
|
Number of tables and chairs at first
= 3 u + 1 u
= 148
4 u = 148
1 u = 148 ÷ 4 = 37
Number of chairs at first
= 3 u
= 3 x 37
= 111
Number of chairs left
= 111 - 26
= 85
5 p = 85
1 p = 85 ÷ 5 = 17
Number of tables thrown away from the basketball court
= 37 - 17
= 20
Answer(s): 20