A drink stall had 126 big and small bottles of tea. The number of big bottles is
311 of the number of small bottles. After selling a few small bottles of tea, there are
13 as many big bottles as small bottles left. How many small bottles of tea were sold?
| |
Big bottles |
Small bottles |
Total |
| Before |
3 u |
11 u |
14 u |
| Change |
|
- 2 u |
|
| After |
1x3 =
3 u |
3x3 =
9 u |
|
The number of big bottles remains unchanged. Make the number of big bottles the same. LCM of 3 and 1 is 3.
Number of big bottles at first = 3 u
Number of small bottles at first = 11 u
Total number of bottles at first
= 3 u + 11 u
= 14 u
14 u = 126
1 u = 126 ÷ 14 = 9
Number of small bottles sold
= 11 u - 9 u
= 2 u
= 2 x 9
= 18
Answer(s): 18
