document.write( "Question 1192505: In 11!/r!(11,r)! - 6 = C(18,17), what is the value of r. Show the solution. \n" ); document.write( "

Algebra.Com's Answer #824384 by greenestamps(13200) $\"\"$ $\"About$

You can put this solution on YOUR website!

\n" ); document.write( "The expression \"(11,r)!\" has no meaning. I will assume you mean \"(11-r)!\".

\n" ); document.write( " $\"C%2818%2C17%29=C%2818%2C1%29=18\"$

\n" ); document.write( " $\"11%21%2F%28r%21%2811-r%29%21%29=C%2811%2Cr%29\"$

\n" ); document.write( "Your equation is

\n" ); document.write( " $\"11%21%2F%28r%21%2811-r%29%21%29-6=18\"$
\n" ); document.write( " $\"11%21%2F%28r%21%2811-r%29%21%29=C%2811%2Cr%29=24\"$

\n" ); document.write( "The values of C(11,r) are 1, 11, 55, ....

\n" ); document.write( "There is no r for which C(11,r) = 24.

\n" ); document.write( "The problem as you show it is faulty.

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