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Mathematics 9 Online
OpenStudy (anonymous):

See attachment

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

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.

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'

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

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

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

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

OpenStudy (anonymous):

It's alright chinchilla (:

OpenStudy (anonymous):

:)

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