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Mathematics 12 Online
OpenStudy (katherinesmith):

**MEDAL WILL BE AWARDED** Find the number of ways to purchase 3 different kinds of drinks from a selection of 10 drinks.

OpenStudy (katherinesmith):

@zepdrix any clue?

OpenStudy (atlas):

You can do it in number of ways

OpenStudy (atlas):

Tell me how many ways you can choose 1 different drink

OpenStudy (atlas):

from 10 different drinks

OpenStudy (atlas):

@katherinesmith

OpenStudy (katherinesmith):

10?

OpenStudy (atlas):

right!

OpenStudy (atlas):

Now assume you have chosen 1st drink and you have to choose your 2nd (different) drink - how many ways can you do that?

OpenStudy (atlas):

HInt: How many different drinks are left after you have chosen your first drink?

OpenStudy (katherinesmith):

9

OpenStudy (atlas):

right!!

OpenStudy (atlas):

Now how many ways to choose your 3rd drink??

OpenStudy (katherinesmith):

7?

OpenStudy (atlas):

Of course not! (Only 2 drinks are taken out of 10)

OpenStudy (katherinesmith):

what? my choices are 100 110 120 140 i really don't know where you're going with this

OpenStudy (atlas):

U just keep on it! YOu will get the answer :P

OpenStudy (katherinesmith):

i've tried a million different combinations so i'm just gonna give up now

OpenStudy (atlas):

your wish :P

OpenStudy (atlas):

answer is 120 btw but u should not give up............u don't learn that way

OpenStudy (atlas):

And I am sure you never tried MILLION different combinations..........you could have got your answer b4 that

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