A drink stall had 78 big and small bottles of coffee. The number of big bottles is
211 of the number of small bottles. After selling a few small bottles of coffee, there are
14 as many big bottles as small bottles left. How many small bottles of coffee were sold?
| |
Big bottles |
Small bottles |
Total |
| Before |
2 u |
11 u |
13 u |
| Change |
|
- 3 u |
|
| After |
1x2 =
2 u |
4x2 =
8 u |
|
The number of big bottles remains unchanged. Make the number of big bottles the same. LCM of 2 and 1 is 2.
Number of big bottles at first = 2 u
Number of small bottles at first = 11 u
Total number of bottles at first
= 2 u + 11 u
= 13 u
13 u = 78
1 u = 78 ÷ 13 = 6
Number of small bottles sold
= 11 u - 8 u
= 3 u
= 3 x 6
= 18
Answer(s): 18
