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OpenStudy (anonymous):
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?
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OpenStudy (anonymous):
2! Times 18!
OpenStudy (wolf1728):
How many different colors
OpenStudy (stamp):
Ayeshaafzal111 gave you the answer, anitasara. Do you care to discuss the solution?
OpenStudy (anonymous):
@wolf1728 it doesn't matter how many colors, since it is permutations we know all the globes are distinct.
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