Asked by bandit

evaluate

8C5
Answered by Damon
Sorry, I do not understand your notation.
Do you perhaps mean the binomialcoefficient C(8,5) ?
That would be
8!
-------
(5!)(3!)
which is
8*7*6
-------
3*2
which is
8*7
which is
56
Answered by Reiny
Damon, back in the olden days, in the days of antiquity when I was teaching that stuff we often used the notation

<sub>8</sub>C<sub>5</sub>

and it meant C(8,5)

Some older text book would have used the notation

<sub>8</sub>P<sub>5</sub> to stand for P(8,5)
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