Mathematics NDA/NA SOLVED PAPER 2018 (II) (01 to 50)

Total Questions: 50

11. What is the coefficient of the middle term in the binomial expansion of (2 + 3x)⁴?

Correct Answer: (d) 216
Solution:

12. For a square matrix A, which of the following properties hold?

Correct Answer: (d) 1, 2 and 3
Solution:

13. Which one of the following factors does the expansion of the determinant:

Correct Answer: (a) x − 3
Solution:

14. What is the adjoint of the matrix:

Correct Answer: (a)
Solution:

15. Solve the following equation?

Correct Answer: (b) 2
Solution:

16. There are 17 cricket players, out of which 5 players can bowl. In how many ways can a team of 11 players be selected so as to include 3 bowlers?

Correct Answer: (d) C (5, 3) × C (12, 8)
Solution:

17. Find the answer of given equation?

Correct Answer: (b) 19/6
Solution:

18. If A and B are two invertible square matrices of same order, then what is (AB)⁻¹ equal to?

Correct Answer: (a) B⁻¹A⁻¹
Solution:

If A and B are two invertible square matrices of same order, then
(AB)⁻¹ = B⁻¹ A⁻¹

19. Simplify the question?

Correct Answer: (d)
Solution:

20. Simplify the equation?

Correct Answer: (b) −16
Solution: