Teaching Haryana (HPSC) PGT Mock Test 2024 Mathematics Permutations and Combinations Factorial and its Properties
If \(\frac{{n!}}{{2\left( {n - 2} \right)!}}\;and\frac{{n!}}{{4!\left( {n - 4} \right)!}}\) are in the ratio 2 : 1 then find the value of n ?
1
7
2
8
3
10
4
5
5
Question Not Attempted