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The corner points of the feasible region determined by the following system of linear inequalities :

2x+y≤102x + y \leq 10, x+3y≤15x + 3y \leq 15, x,y≥0x, y \geq 0 are (0, 0), (5, 0), (3, 4) and (0, 5). Let z=px+qyz = px + qy, where p,q>0p, q > 0 condition on p and q so that maximum of z occurs at both (3, 4) and (0, 5) is :

Solution

✅ Correct Option: 4

For maximum at both (3,4)(3,4) and (0,5)(0,5): z(3,4)=z(0,5)z(3,4) = z(0,5), i.e., 3p+4q=5q3p + 4q = 5q, giving 3p=q3p = q, so q=3pq = 3p.

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