40:50
Permutation and combination class 11 || Jee || Factorial || Double factorial
INTOTO MATHS
32:08
Permutation and combination #class11 | #iitjee | To find last non zero digit of factorial
43:10
Permutation and combination class 11 | #jee | Fundamental principle of counting
39:19
#permutationandcombination | #class11 | Jee | numericals on fundamental principle of counting
