Answer:
Step-by-step explanation:
Let n₁ and n₂ be the number of set produced of model A and B per day .
n₁ + n₂ = 60
20 < n₁ < 60
10 < n₂ < 40
Total profit Q = 45 n₁ + 55 n₂ = 45 n₁ + 55 ( 60 - n₁ )
Q = 3300 - 10 n₁
So to maximise total profit n₁ needs to be minimum . The minimum value of n₁ = 20
Q = 3300 - 10 x 20
= $ 3100
So model A should be produced 20 and model B should be produced 40 sets .