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3 years ago

7

Six students are being grouped into three pairs to work on a science lab. how many different combinations of three pairs are pos

sible

1 answer:

pychu [463]3 years ago

4 0

We want to select 3 pairs of people from a group of 6.

We use the formula:

n! / (r! * (n -r)!)

where n = 6 and r = 2

combinations = 6! / (2! * 4!) =

combinations = 6 * 5 / 2

combinations = 15

Source:

1728.com/combinat.htm

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2 years ago

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see the explanation

Step-by-step explanation:

<u><em>The complete question is</em></u>

The first three steps of completing the square to solve the quadratic equation x2 +4x -6= 0, are shown below.

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Step 2: x2 +4x+4=6+4

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