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maks197457 [2]
3 years ago
14

Last year at a certain high school, 12 students sought the nomination for president of the student body. In how many ways could

the voters (student body) rank their first 4 choices?
Mathematics
1 answer:
Vlada [557]3 years ago
8 0

Answer:

<h3>495 different ways</h3>

Step-by-step explanation:

This question bothers on combination. Combination has to do with selection. When selecting r objects from a pool of n objects, this is expressed as;

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

For us to choose rank the first 4 choices from 12 students nominated, this can be done in 12C4 number of ways;

12C4 = 12!/(12-4)!4!

12C4 = 12!/8!4!

12C4 = 12*11*10*9*8!/8!*4*3*2

12C4 = 12*11*10*9/24

12C4 = 11880/24

12C4 = 495 ways

Hence this can be done in 495 different ways

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Will bought several books that cost $ 2.50 each and received a $ 2 discount on the total bill. If he paid $ 10.50, how many books did he buy ?

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Answer:

X² - 14x + 48= 0

Step-by-step explanation:

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The quadratic curve didn't pass the origin .

It intercepted the x axis at 6 and 8 and that's the roots.

So our equation is

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Students will randomly select a tile from a bag containing one red, one yellow, one blue and one green tile. and then roll a cub
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The number of more miles he needs to run to complete the race is 19 miles.

<h3 /><h3>How to find distance in miles?</h3>

He has run 7 miles from point a to point b of a race.

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learn more on distance(miles) here: brainly.com/question/9950097

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