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anonymous

  • one year ago

Help pretty plz with math on top lol

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    Way out of my grade x.x

  3. kyanda17
    • one year ago
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    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

  4. anonymous
    • one year ago
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    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 \[P(blue~1st,~red~2nd)=\frac{ no.~of ~blue~pencils }{ total~no.~of~pencils } \times \frac{ no.~of~red~pencils }{ total~no.~of~pencils-1}\]

  5. anonymous
    • one year ago
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    so the denominator is 127 but decreased makes 126 right

  6. anonymous
    • one year ago
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    original denominator is 24+15+8.

  7. anonymous
    • one year ago
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    lol my bad 51 but decreased make's it 50

  8. anonymous
    • one year ago
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    24+15+8=47

  9. anonymous
    • one year ago
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    ooh sorry put my numbers in the calculator wrong lol so when its decreased makes 46

  10. anonymous
    • one year ago
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    right

  11. anonymous
    • one year ago
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    so 24 / 46 simplify right

  12. anonymous
    • one year ago
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    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

  13. anonymous
    • one year ago
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    Ok im confused so 15/46

  14. anonymous
    • one year ago
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    15/47

  15. anonymous
    • one year ago
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    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. \[P(blue~then~red)=\frac{ 15 }{ 47 }\times \frac{ 24 }{ 46 }\]

  16. anonymous
    • one year ago
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    ok then i have tha percent ???

  17. anonymous
    • one year ago
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    yes

  18. anonymous
    • one year ago
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    thank u hope i got it tho

  19. anonymous
    • one year ago
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    what did you get?

  20. anonymous
    • one year ago
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    why did i get 180

  21. anonymous
    • one year ago
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    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

  22. anonymous
    • one year ago
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    180/1081

  23. anonymous
    • one year ago
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    then just divide that to get the decimal. Multiply the decimal by 100 to get the percent

  24. anonymous
    • one year ago
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    ok

  25. anonymous
    • one year ago
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    thats hard

  26. anonymous
    • one year ago
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    why i get this long number

  27. anonymous
    • one year ago
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    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

  28. anonymous
    • one year ago
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    Im not that good with stuff like that

  29. anonymous
    • one year ago
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    what did you get? put the first 4 digits up

  30. anonymous
    • one year ago
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    0.166

  31. anonymous
    • one year ago
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    ok. I thought you had taken it to % already|dw:1440011237821:dw|

  32. anonymous
    • one year ago
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    Ohhh so thats tha percent

  33. anonymous
    • one year ago
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    yes

  34. anonymous
    • one year ago
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    Thank u boy or girl i dont know but thx so much this been a horrible week

  35. anonymous
    • one year ago
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    you're welcome

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