In a class there are x seats. If each student occupies one seat, 9 students remain standing and if two students occupy one seat, 7 seats are left empty. Then, the number of seats in the class is
(A)23 (B)32 (C)18 (D)21
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No. of seats x
let no. of student be y
ATQ x=y-9 ----(1)
and y/2=x-7 ⇒y=2x-14 ----(2)
Substituting value of y in (1)
We have x=2x-14-9
that gives x=23
let no. of student be y
ATQ x=y-9 ----(1)
and y/2=x-7 ⇒y=2x-14 ----(2)
Substituting value of y in (1)
We have x=2x-14-9
that gives x=23
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