Question

How many 5-letter arrangements of the letters T, E, X, A, S can be created if eachletter is used only once?What is the answer?

Answer 1

ANSWER

120

EXPLANATION

We have to find the number of permutations of 5 letters in 5 spots:

$_5P_5=\frac{5!}{(5-5)!}=5!=5\cdot4\cdot3\cdot2\cdot1=120$