Answer:
64 chickens
Explanation:
Let the total percentage of animals be represented as = 100%
100% = 20% + 30% + 10% + % Chicken
% Chicken = 100% - ( 20% + 30% + 10% )
% Chicken = 100% - 60%
% Chicken = 40%
The number of animals on the farm = 160
The number of chickens on the farm = 40% × 160
= 40/100 × 160
= 64 chickens