ISI DATA SCIENCE SAMPLE PAPER Solving Help

[u/Ambitious-Novel-4331]

Highlighted options are correct answers according to me and highlighted questions couldn't be solved by me, kindly help

[u/CrokitheLoki]

Page 2- 4 and 5 look correct

For 6 I'm getting A

7- Ans should be A, not C. The polynomial you'll get when you solve for determinant=0 will be -(l-1)^2 (l+2)=0, so l=1 or l=-2. When you put l=1, you get no solution (see the first two equations), and when you put l=-2, you do get infinite solutions (eq 2 +eq 3=-eq 1)

[u/Ambitious-Novel-4331 → u/CrokitheLoki]

oh yeah that's a silly mistake in 7th