2 years ago

Please i need asp this is me ether failing or passing math!!!

Mathematics

1 answer:

Citrus2011 [14]2 years ago

8 0

Answer:

Step-by-step explanation:

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Urgent math help needed will mark brainliest

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Many calculators have a key that will do this in one step. Mine is one of them. So let's start with the answer and then we'll do it the long way.

9C3 = 84. You put it into your calculator as 9 2nF nCr 3 =

Solution

$\dfrac{9!}{(n - 3)!3!} = \dfrac{9*8*7*6!}{6!*3!}=\dfrac{9*8*7}{6}$

3*4*7 = 84 which is what you set out to show.

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