712 of the students go to school by train.
35 of the remaining students go to school by car and
12 of the rest go by cycling to school. The remaining students go to school by bus. The number of students who go to school by bus is 140 fewer than those who go to school by train. What is the enrolment of the school?
By train |
Remaining students |
7 |
5 |
|
By car |
By cycling |
By bus |
|
3 |
2 |
|
|
1 |
1 |
7 u |
3 u |
1 u |
1 u |
Number of more students who go by bus than by train
= 7 u - 3 u
= 4 u
4 u = 140
1 u = 140 ÷ 4 = 35
Total enrolment of the school
= 12 u
= 12 x 35
= 420
Answer(s): 420