The number of selection of n objects from 2n objects of which n are identical and the rest are different is

Prove that the number of ways to select n objects from 3n objects of whilch n are identical and the rest are different is 2^(2n-1)+((2n)!)/(2(n!)^(2))

Prove that the number of ways to select n objects from 3n objects of whilch n are identical and the rest are different is 2^(2n-1)+((2n) !)/(2(n !)^2)

Which of the following is not the number of ways of selecting n objects from 2n objects of which n objects are identical

Which of the following is not the number of ways of selecting n objects from 2n objects of which n objects are identical

Prove that the number of selections of n things from two sets of n identical things and n other distinct things is (n+2)2^(n-1)

The number of circular permutations of n different objects is