Suppose all sheep are sheep, each sheep has 4 legs, and a * * * has 4×36= 144 legs, which is more than the actual 144- 100=44. Every time a chicken replaces a sheep, the total number of legs is reduced by 4-2=2 legs.
So the number of chickens = (4× 36-100) ÷ (4-2) = 44 ÷ 2 = 22;
Number of sheep =36-22= 14.
A: There are 22 chickens and 0/4 sheep.