Question

there are 30 students in a class, of which 7 come by school bus ,8 come by cycles ,7 get dropped by their parents and remaining students come by walk,so how many of them come by walk?
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Answer 1

Step-by-step explanation:

⇒Let the total no. of students =x

⇒No. of students who come by car=

5

2x

⇒No. of students who come by bus=

4

x

⇒No. of students who come by walk=x−(

5

2x

+

4

x

)

=

20

7x

⇒No, of students who come by walk on their own

⇒

20

7x

×

3

1

=224

x=1920.