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A manufacturing company makes two types of television sets: one is black and white and the other is colour. The company has resources to make at most 300 sets a week. It takes Rs. 1800 to make a black and white set and Rs. 2700 to make a coloured set. The company can spend not more than Rs. 6,48,000 a week to make television sets. It makes a profit of Rs. 510 per black and white set and Rs. 675 per coloured set. Assuming x and y respectively are the number of black and white, and coloured sets made each week, answer the questions :

The corner points of feasible region are:

A. (0, 240)

B. (0, 0)

C. (300, 0)

D. (120, 180)

E. (180, 120)

Choose the correct answer from the options given below:

Solution

✅ Correct Option: 3

Constraints: x+y≤300x + y \leq 300, 2x+3y≤7202x + 3y \leq 720, x,y≥0x, y \geq 0.

Intersection of x+y=300x+y=300 and 2x+3y=7202x+3y=720: y=300−xy = 300-x, so 2x+3(300−x)=720⇒x=180,y=1202x + 3(300-x) = 720 \Rightarrow x = 180, y = 120, giving E(180,120)E(180,120).

Other corners: B(0,0)B(0,0), C(300,0)C(300,0) (on x-axis), A(0,240)A(0,240) (where 2x+3y=7202x+3y=720 meets y-axis).

So A, B, C, E.

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