NDA || Mathematics || Algebra || P&C || Quiz 2020

The no. of five digit number that can be formed by using 1, 2, 3only, such that exactly three digits in the formed numbers are same is ________

The number of ways in which a committee of 3 women and 4 men be chosen from 8 women and 7 men is formed in Mr. A refuses to serve on the committee if Mr. B is a member of the committee is _______

If  =  +  , then value of n is _________

If a_n =  then value of  is _________

Ten different letters of an alphabet are given words with 5 letters are formed from the given letters. The no. of words which have at least one letter repeated is _____