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In a row of students, Sohan is 9th from ...

In a row of students, Sohan is 9th from either end of the row. Find the number of students in a row.

A

10

B

18

C

17

D

19

Text Solution

Verified by Experts

The correct Answer is:
C
Clearly, the number of students in a row are
N =Top rank + Bottom rank - 1
`= Tr + Br -1 `
` = 9 + 9 - 1`
`= 17`
So the answer is (c )
Remember (i) N = Tr + Br -1
(ii) Tr = ( N + 1) - Br
(iii) Br = (N + 1) - Tr
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