Help pretty plz with math on top lol

- anonymous

Help pretty plz with math on top lol

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- schrodinger

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- anonymous

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- anonymous

Way out of my grade x.x

- kyanda17

i think u add all of the colors and find the fraction for her and her friend if i aam right it is out my grade like way out but i tried

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## More answers

- anonymous

Find the probability of selecting a blue pencil first. Then the probability of selecting a red pencil. For the second selection, there's one less in the bag, so the denominator will be decreased by 1.
Multiply the individual probabilities to get the final
\[P(blue~1st,~red~2nd)=\frac{ no.~of ~blue~pencils }{ total~no.~of~pencils } \times \frac{ no.~of~red~pencils }{ total~no.~of~pencils-1}\]

- anonymous

so the denominator is 127 but decreased makes 126 right

- anonymous

original denominator is 24+15+8.

- anonymous

lol my bad 51 but decreased make's it 50

- anonymous

24+15+8=47

- anonymous

ooh sorry put my numbers in the calculator wrong lol so when its decreased makes 46

- anonymous

right

- anonymous

so 24 / 46 simplify right

- anonymous

24/46 will be the probability for the 2nd selection. You don't really have to simplify it because they want a percent.
You still need the probability for the 1st selection. P = blue/original total

- anonymous

Ok im confused so 15/46

- anonymous

15/47

- anonymous

what's happening is she's selecting a blue pencil first when there are 47 pencils in the bag and 15 of them are blue. So the probability is 15/47.
Then she's selecting a red pencil, but now there are only 46 in the bag and 24 of them are red. This probability is 24/46.
To find the probability of doing both, you have to multiply the individual probabilities.
\[P(blue~then~red)=\frac{ 15 }{ 47 }\times \frac{ 24 }{ 46 }\]

- anonymous

ok then i have tha percent ???

- anonymous

yes

- anonymous

thank u hope i got it tho

- anonymous

what did you get?

- anonymous

why did i get 180

- anonymous

I don't know. You should have gotten a decimal. try it this way
\[\frac{ 15*24 }{ 46*47 }\]
Multiply the 15 and 24. Then multiply 46 and 47. Post the fraction you get

- anonymous

180/1081

- anonymous

then just divide that to get the decimal.
Multiply the decimal by 100 to get the percent

- anonymous

ok

- anonymous

thats hard

- anonymous

why i get this long number

- anonymous

because it's a really ugly fraction and the numbers just don't divide nicely.
That's why they said round it to the nearest 10th

- anonymous

Im not that good with stuff like that

- anonymous

what did you get? put the first 4 digits up

- anonymous

0.166

- anonymous

ok. I thought you had taken it to % already|dw:1440011237821:dw|

- anonymous

Ohhh so thats tha percent

- anonymous

yes

- anonymous

Thank u boy or girl i dont know but thx so much this been a horrible week

- anonymous

you're welcome

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