document.write( "Question 807345: How many different seven-letter sequences can be formed from the letters a, a, a, a, a, b, c? \n" ); document.write( "

Algebra.Com's Answer #486288 by edjones(8007) $\"\"$ $\"About$

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7!/5! The 7! is for the 7 letters and the 5! is for the 5 a's.
\n" ); document.write( "=7*6*5!/5!
\n" ); document.write( "=7*6
\n" ); document.write( "=42
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