A drink stall had 121 small and big bottles of milk. The number of small bottles is
29 of the number of big bottles. After selling a few big bottles of milk, there are
13 as many small bottles as big bottles left. How many big bottles of milk were sold?
| |
Small bottles |
Big bottles |
Total |
| Before |
2 u |
9 u |
11 u |
| Change |
|
- 3 u |
|
| After |
1x2 =
2 u |
3x2 =
6 u |
|
The number of small bottles remains unchanged. Make the number of small bottles the same. LCM of 2 and 1 is 2.
Number of small bottles at first = 2 u
Number of big bottles at first = 9 u
Total number of bottles at first
= 2 u + 9 u
= 11 u
11 u = 121
1 u = 121 ÷ 11 = 11
Number of big bottles sold
= 9 u - 6 u
= 3 u
= 3 x 11
= 33
Answer(s): 33
