Question

One-fourth of birds of a flock are at a river
bank and one-fifth of that flock are in their
nest. Remaining 22 birds are wandering in
search of food. What is the number of birds
which are in their nest?
(A) 40
(B) 18
(C) 10
(D) 8​

Answer 1

Let the total no of birds be x

then,

(x/4)+(x/5)+22=x

(9x/20)+22=x

x-(9x/20)=22

11x/20=22

x=(22*20)/11

x=40

therefore,

total no of birds=40

no of birds in nest=(1/5)*40

=8

hope it helps

:-)

Answer 2

Answer:

Step-by-step explanation:

Let the number of birds in the nest=x

Than, one fourth of birds are flock at river = x/4

One fifth are in nest =x/5

Remaining birds = 22

Solution–

x/4 +x/5+22 =x

5x+4x+440=20x

440=11x

x=40

Total number of birds =40

The number of birds in nest=40/5=8

So , 8is right answer