anonymous
  • anonymous
Help pretty plz with math on top lol
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
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anonymous
  • anonymous
Way out of my grade x.x
kyanda17
  • 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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anonymous
  • 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
  • anonymous
so the denominator is 127 but decreased makes 126 right
anonymous
  • anonymous
original denominator is 24+15+8.
anonymous
  • anonymous
lol my bad 51 but decreased make's it 50
anonymous
  • anonymous
24+15+8=47
anonymous
  • anonymous
ooh sorry put my numbers in the calculator wrong lol so when its decreased makes 46
anonymous
  • anonymous
right
anonymous
  • anonymous
so 24 / 46 simplify right
anonymous
  • 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
  • anonymous
Ok im confused so 15/46
anonymous
  • anonymous
15/47
anonymous
  • 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
  • anonymous
ok then i have tha percent ???
anonymous
  • anonymous
yes
anonymous
  • anonymous
thank u hope i got it tho
anonymous
  • anonymous
what did you get?
anonymous
  • anonymous
why did i get 180
anonymous
  • 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
  • anonymous
180/1081
anonymous
  • anonymous
then just divide that to get the decimal. Multiply the decimal by 100 to get the percent
anonymous
  • anonymous
ok
anonymous
  • anonymous
thats hard
anonymous
  • anonymous
why i get this long number
anonymous
  • 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
  • anonymous
Im not that good with stuff like that
anonymous
  • anonymous
what did you get? put the first 4 digits up
anonymous
  • anonymous
0.166
anonymous
  • anonymous
ok. I thought you had taken it to % already|dw:1440011237821:dw|
anonymous
  • anonymous
Ohhh so thats tha percent
anonymous
  • anonymous
yes
anonymous
  • anonymous
Thank u boy or girl i dont know but thx so much this been a horrible week
anonymous
  • anonymous
you're welcome

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