Question

Can someone please help me? I am confusion!

Answer 1

a) 885 students

b) 18 students

Explanation:

a) We know that 24 of the students were surveyed and 17 of them said they always wear a bike helmet.

So out of 1250 students, the estimated number of students who always wear a bike helmet will be =
`(17)/(24)` ×
`1250` = 885.4

Therefore, approximately 885 students always wear a bike helmet.

b) We know the ratio of students who always wear a bike helmet i.e.
`(17)/(24)`.

So if 13 of the students surveyed said they always wear helmets, we can find the total number of students surveyed this time by assuming it to be n.

`(17)/(24)` ×
`n = 13`

`n = (13*24)/(17)`

`n = 18.35` ≈
`18`

Therefore, 18 students were surveyed the second time.