Used Once
Used Once
how many three-letter arrangements can be formed if a letter is used only once?
how many three-letter arrangements can be formed if a letter is used only once?
1) TIGER
explain how you got your answer please!
Imagine 3 slots. You have 5 ways to fill the first, which leaves you just 4 options for the second slot.
That selection, in turn, leaves you with just 3 options for third slot.
5 x 4 x 3 = 60.
Factorials and combinations could be part of larger picture. Both words are good triggers for search engines. [google, bing, etc.]
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