Mathematics
9 Online
OpenStudy (anonymous):
See attachment
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OpenStudy (anonymous):
OpenStudy (firejay5):
5/55
OpenStudy (anonymous):
Explain please ?
OpenStudy (anonymous):
@Kitt020912
OpenStudy (firejay5):
Well for example say if you 5 red skittles, 3 green, and 10 purple, What's the probability of it will be yellow
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OpenStudy (anonymous):
Okay; thanks.
OpenStudy (firejay5):
answer my example
OpenStudy (firejay5):
It should be 0/18
OpenStudy (anonymous):
Prenez mes réponses, je peux vous garantir qu'ils sont meilleurs (; LOL
Donnez-moi juste un peu de temps (:
OpenStudy (anonymous):
Oh,I didn't know you wanted me to answer.
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OpenStudy (anonymous):
Will do @Kitt020912
OpenStudy (firejay5):
why is it 0/18
OpenStudy (anonymous):
Wait, how many purple ones are there?
OpenStudy (firejay5):
there 10 purple, 3 green, and 5 red
OpenStudy (anonymous):
Yes, and you are asking how many 'will be yellow'
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OpenStudy (anonymous):
There are only purple,green,and red Skittles in your example - no yellow ones.
OpenStudy (anonymous):
O, right. Since there are NO yellow ones...it will be 0. Of course.
OpenStudy (anonymous):
*facepalm*
OpenStudy (firejay5):
right so no yellow means 0; how did I get 18
OpenStudy (anonymous):
3+5+10
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OpenStudy (firejay5):
so exactly so in your problem 5 + 20 + 30 seconds = 55 seconds
OpenStudy (anonymous):
Oh,ok.
OpenStudy (anonymous):
So 55 is the denominator and the numerator is?
OpenStudy (firejay5):
so then find which ever item you need to find the probability of
OpenStudy (firejay5):
and the numerator is the number of whatever will find the probability of
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OpenStudy (anonymous):
I need yellow.
OpenStudy (firejay5):
yellow is 5 seconds
OpenStudy (firejay5):
the probability of the yellow light turning on is 5/55 = 0.09%
OpenStudy (anonymous):
the denominator is 55 because it's the total. You're looking for the yellow, so it's \[\frac{ 5 }{ 55 }\] which reduces to \[\frac{ 1 }{ 11 }\]
OpenStudy (anonymous):
oooo
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OpenStudy (anonymous):
i had not thought of reducing
OpenStudy (anonymous):
again.
OpenStudy (anonymous):
Sorry bout that.
OpenStudy (firejay5):
I forgot to reduce it
OpenStudy (firejay5):
sorry
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OpenStudy (anonymous):
It's alright chinchilla (:
OpenStudy (anonymous):
:)