The number of mocca cakes on display at a cafe was
23 of the number of croissants on display. After 22 mocca cakes were bought and the staff added another 36 croissants, the number of croissants was twice the number of mocca cakes. The last group of customers bought 4 croissants each, finishing all the croissants on display. How many customers were there in the last group?
| |
Mocca cakes |
Croissants |
| Before |
2 u |
3 u |
| Change |
- 22 |
+ 36 |
| After |
2 u - 22 |
3 u + 36 |
Comparing mocca cakes
and croissants
in the end |
1 |
2 |
The number of croissants was twice the number of mocca cakes in the end.
Number of croissants in the end
= 2(2 u - 22)
= 4 u - 44
4 u - 44 = 3 u + 36 4 u - 3 u = 44 + 361 u = 80
1 u = 80 ÷ 1 = 80Number of croissants in the end= 3 u + 36= 3 x 80 + 36= 276Number of customers in the last group= 276 ÷ 4= 69 Answer(s): 69 
