3 years ago

PLEASE HELP ME WITH THIS QUESTION! I CANT FIGURE IT OUT, PLEASE HELP:/

Mathematics

1 answer:

8090 [49]3 years ago

4 0

Answer:

i did something wrong since i have more than one answer

Step-by-step explanation:

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A president, treasurer, and secretary, all di erent, are to be chosen from a club consisting of 12 people (whose names are I, J,

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There are 220 choices

Step-by-step explanation:

Given

$People = 12$

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Required

Determine number of selection (if no restriction)

This is calculated using the following combination formula:

$^nC_r = \frac{n!}{(n - r)!r!}$

Where

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So, we have:

$^nC_r = \frac{n!}{(n - r)!r!}$

$^{12}C_3 = \frac{12!}{(12 - 3)!3!}$

$^{12}C_3 = \frac{12!}{9!3!}$

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$^{12}C_3 = \frac{12*11*10}{3!}$

$^{12}C_3 = \frac{12*11*10}{3*2*1}$

$^{12}C_3 = \frac{12*11*10}{6}$

$^{12}C_3 = 2*11*10$

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<em>There are 220 choices</em>

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