SOLUTION: How many different seven-letter sequences can be formed from the letters a, a, a, a, a, b, c?

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Question 807345: How many different seven-letter sequences can be formed from the letters a, a, a, a, a, b, c?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
7!/5! The 7! is for the 7 letters and the 5! is for the 5 a's.
=7*6*5!/5!
=7*6
=42
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Ed