PSLEThere were a total of 192 tables and chairs in a tuckshop. There were 2 times as many chairs as tables. After 16 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 tuckshop?
|
Tables |
Chairs |
Total |
Before |
1 u |
2 u |
192 |
Change |
- ? |
- 16 |
|
After |
1 p |
4 p |
|
Number of tables and chairs at first
= 2 u + 1 u
= 192
3 u = 192
1 u = 192 ÷ 3 = 64
Number of chairs at first
= 2 u
= 2 x 64
= 128
Number of chairs left
= 128 - 16
= 112
4 p = 112
1 p = 112 ÷ 4 = 28
Number of tables thrown away from the tuckshop
= 64 - 28
= 36
Answer(s): 36