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?



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Answer 1

Answer:

Let the total number of deer be X

Therefore X/4 is at River bank

X/5 is has gone to nest

And 22 searching food

X/4+X/5+22=X

9X/20+22=X

X-9X/20=15

11X=22x20

X=440/11=40

Total number of birds=40