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Algebra
Tutor: None Selected Time limit: 1 Day

Jul 27th, 2015

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A formula for the number of possible combinations of r objects from a set of n objects. This is written in any of the ways shown below.

All forms are read aloud "n choose r."

Formula: Note: , where nPr is the formula for permutations of n objects taken r at a time.

the answers are as follows;

2)=A

3)=A

4)=10


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Jul 27th, 2015

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