how could I reattempt the mock test?

You cannot reattempt BUT while going through solutions for that mock test, you can set a timer yourself and practice. Then you can check solutions.

No, you cannot reattempt any mock test.

Sir pls tell how to think through a problem & reduce silly mistakes...it is very demotivating..to lose marks this way...destroys the confidence altogether..

True matee......breaks our confidence into pieces

x+y+z=5 no.of non zero solutions are n-1Cr-1. 4C2

Use the Formula (n-1) C (r-1) where n is the number of things to be distributed and r is the number to whom it need to be distributed,