Im confused on how to do this can someone explain???

Mathematics

1 answer:

sesenic [268]3 years ago

3 0

Answer: you add them all up

Step-by-step explanation: you can get the answer from above and dont trust this answer.

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$_{n}C_{r} = \dfrac{n!}{(n - r)!r!}$

$_{25}C_{10} = \dfrac{25!}{(25 - 10)!10!}$

$_{25}C_{10} = \dfrac{25 \times 24 \times 23 \times 22 \times 21 \times 20 \times 19 \times 18 \times 17 \times 16 \times 15!}{15! \times 10 \times 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1}$

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Which number should each side of the equation 3/4 = 9 be multiplied by to produce the equivalent equation of x = 12?

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