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rjkz [21]
2 years ago
15

Ten individuals are candidates for a committee. Two will be selected. How many different pairs of individuals can be selected?

Mathematics
2 answers:
Nina [5.8K]2 years ago
6 0

Answer:

45

Step-by-step explanation:

The different pairs of individual can be computed using rule of combination.

The combination is denotes as nCr.

nCr=n!/(r!(n-r)!)

In the given problem n=total candidates=10 and r= Selected candidates=2.

10C2=10!/(2!(10-2)!)

10C2=10*9*8!/(2!8!)

10C2=90/2

10C2=45

So, 45 different pairs of individuals can be selected.

Zielflug [23.3K]2 years ago
4 0

Answer:

45

Step-by-step explanation:

Pairs that can be selected = 10C2

= \frac{10!}{2!(10-2)!}= \frac{10!}{2!*8!}\\  \\= \frac{10*9*8!}{2*1*8!}= \frac{10*9}{2*1}\\  \\= 5 * 9 = 45

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