Concept:A linear programming problem (LPP) is formed by identifying the objective function that needs to be optimized and all the given constraints on the decision variables.
Explanation:Profit on each executive class ticket is Rs
1500.
Profit on each economy class ticket is Rs
900.
So total profit is
z=1500x1+900x2.
Since the airline wants to maximize profit, the objective is
Maximize z.
The maximum passenger capacity gives:
x1+x2≤250.
At least 30 seats are reserved for executive class:
x1≥30.
At least 4 times as many passengers prefer economy class over executive class:
x2≥4x1.
The number of passengers cannot be negative, so:
x1≥0,
x2≥0.
Thus, the required LPP is:
Maximize z=1500x1+900x2subject to:
x1+x2≤250,x1≥30,x2≥4x1,x1,x2≥0.Answer:The correct option is
D.