There are deer and peacocks in a zoo. The total number of their heads is 80 and the total number of their legs is How many peacocks are there?

A 20

B 30

C 50

D 60

Correct Answer: Option D

Let x and y be the number of deer and peacocks in the zoo respectively. Then,

x + y = 80 ...(i) and

4x + 2y = 200 or 2x + y = 100 ...(ii)

Solving (i) and (ii), we get) x = 20, y = 60.