AFCAT II 2018 Solved Paper

(d) Let number of students fail and pass in the class are x and y respectively.
ATQ ,
70 (x + y) = 40x + 80y
30x = 10y ⇒ y = 3x
Now,

y

x

= 3

y

x+y

=

3

1+3

{By componendo & devedendo}.
∴ Percentage of pass students =

3

4

x 100 = 75%