Wednesday
April 1, 2015

Homework Help: Pre Calc

Posted by Emma B on Sunday, September 12, 2010 at 6:47pm.

The symbol nCr, rea "n choose r" or "the number of combinations of n things taken r at a time" is the number:

n!
-----
r!(n-r)!

a:find 4C1
b:Find 5C0 and 5C5
c: Find 7C1, 7C2, 7C3

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