Satish is making school spirit keychains, which consist of a sequence of n beads on a string. he has blue beads and gold beads. how many unique keychains can he make with exactly k ≤ n blue beads?

Step-by-step explanation:

Satish is making school spirit key chains, which consist of a sequence of n beads, that are blue and golden.

Also given, there are k ≤ n blue beads.

So, the number of unique key chains that can be made is :

;

8/k

step-by-step explanation: