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4 D 10673-A
12. If A = 1 then At =
2 5
-5 8 $ 8
(A) ‏9ب‎ 1 (B) -2 ೪.
-5 3
(C) 2-1 (D) None of the above.

13.

14.

15.

Let A be a square matrix.

P: A exist for every square matrix A. Q: There are square matrices A whose inverse does not
exist.

(A) Pis true and Q is false. (B) Pis false and Q is true.
(C) Pand Qare false. (D) Pand Qare true.
The maximum value of the objective function z = 3x + 4y, subject to the following constraints
2%. ೫54
- + ‏و2‎ > 4
x>0
y 20
(A) 6. (B) 12.
(C) 18. (D) 24.

What is the solution of the following linear programming problem ?

Minimize Z =2x + 4y
subject to x+2y>10

32൮210

x20

೫20.
(4) 5. (8) 10.
(0) 15. (2) 20.

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