PSLEThere were a total of 196 tables and chairs in a tuckshop. There were 3 times as many chairs as tables. After 15 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 |
3 u |
196 |
Change |
- ? |
- 15 |
|
After |
1 p |
4 p |
|
Number of tables and chairs at first
= 3 u + 1 u
= 196
4 u = 196
1 u = 196 ÷ 4 = 49
Number of chairs at first
= 3 u
= 3 x 49
= 147
Number of chairs left
= 147 - 15
= 132
4 p = 132
1 p = 132 ÷ 4 = 33
Number of tables thrown away from the tuckshop
= 49 - 33
= 16
Answer(s): 16