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Mathematics
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OpenStudy (katherinesmith):
**MEDAL WILL BE AWARDED**
Find the number of ways to purchase 3 different kinds of drinks from a selection of 10 drinks.
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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
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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
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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
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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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