A party-light kit consists of 20 coloured globes connected to each other in a straight line. How many different permutations of coloured globes are there if the first and last globes must both be red?

Question

anonymous · Answer

2! Times 18!

wolf1728 · Answer

How many different colors

stamp · Answer

Ayeshaafzal111 gave  you the answer, anitasara.

Do you care to discuss the solution?

anonymous · Answer

@wolf1728 it doesn't matter how many colors, since it is permutations we know all the globes are distinct.