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Oksana_A [137]
3 years ago
11

I need help please and thanks

Mathematics
1 answer:
dimulka [17.4K]3 years ago
5 0

Answer:

10

Step-by-step explanation:

n is the number of selections and k the number selected, that is

n = 5 and k = 2

note that n! = n(n - 1)(n - 2) ..... × 3 × 2 × 1, thus

\frac{5(4)(3)(2)(1)}{2!(5-2)!}

= \frac{120}{2(1)3(2)(1)}

= \frac{120}{2(6)}

= \frac{120}{12}

= 10

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