Question 1775 – Nielit Scientific Assistance IT 15-10-2017

M is a square matrix of order ‘n’ and its determinant value is 5, If all the elements of M are multiplied by 2, its determinant value becomes 40. he value of ‘n’ is

Correct Answer: B

Question 7 Explanation:

M has n rows. If all the elements of a row are multiplied by , the determinant value becomes 2*5. Multiplying all the n rows by 2, will make the determinant value 2 ⁿ *5=40. Solving n= 3.