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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Step-by-step explanation:
ONE-fourth birds are at river bank =1x/4=5x/20
one -fifth are in the nest i.e
1x/5=4x/20
4x/20+5x/20+22=total no of birds
9x/20+22
to complete full; we need more 11x/20
11x/20=22
after solving we get
x=40
no of birds which are in the nest=1/5*40=8
no of birds at the river bank=10
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