Asked by Sarah
simplify 8C5
The "C" stands for combinations ( like combinations and permutations )
The "C" stands for combinations ( like combinations and permutations )
Answers
Answered by
Steve
8C5 =
8*7*6*5*4
-------------
1*2*3*4*5
Note that this es equal to
8C3 = (8*7*6)/(1*2*3)
because the 4*5 just cancels out.
to figure nCm, just start with n, and count down for m factors in the top, and starting with 1, count up for m factors in the bottom.
If m > n/2, you can use n-m instead of m, as shown above.
8*7*6*5*4
-------------
1*2*3*4*5
Note that this es equal to
8C3 = (8*7*6)/(1*2*3)
because the 4*5 just cancels out.
to figure nCm, just start with n, and count down for m factors in the top, and starting with 1, count up for m factors in the bottom.
If m > n/2, you can use n-m instead of m, as shown above.
Answered by
Sarah
so 336?
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