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AngelDreamGurl

  • 2 years ago

You draw a marble from a bag of 120 marbles, you chart the color a replace it. estimate the number of marble in the bag that are: -yellow -red -green by using this information How many time been drawn Y-3 R-7 G-5

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  1. SmoothMath
    • 2 years ago
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    Well stated =D

  2. AngelDreamGurl
    • 2 years ago
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    =)

  3. SmoothMath
    • 2 years ago
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    What I'd do is I'd think about how many times I've drawn a marble TOTAL. Then I'd think about how many times I've drawn a specific color. Then I'd guess that the color was that fraction of the whole bag.

  4. SmoothMath
    • 2 years ago
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    For example, imagine I have 20 marbles total in a bag. I draw 4 and I get a red marble once. I can guess that red is 1/4th of the bag, meaning there are 5 red marbles.

  5. AngelDreamGurl
    • 2 years ago
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    ok so how would i do it with 120 marbles

  6. SmoothMath
    • 2 years ago
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    You drew: y-3 r-7 g-5 let's think about trying to guess how many greens are in the bag. Of the marbles that I drew, what fraction were green?

  7. AngelDreamGurl
    • 2 years ago
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    5/15 right?

  8. AngelDreamGurl
    • 2 years ago
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    @SmoothMath

  9. SmoothMath
    • 2 years ago
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    Right. Which is the same as 1/3. So if you pulled 1/3 greens, just assume that 1/3 of the 120 marble bag is greens. How many is that?

  10. AngelDreamGurl
    • 2 years ago
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    um...

  11. AngelDreamGurl
    • 2 years ago
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    \[\approx\]33%

  12. AngelDreamGurl
    • 2 years ago
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    soooo 40

  13. SmoothMath
    • 2 years ago
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    Yes =D

  14. SmoothMath
    • 2 years ago
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    Try the other 2 colors on your own and tell me what you get.

  15. AngelDreamGurl
    • 2 years ago
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    yayyyy

  16. AngelDreamGurl
    • 2 years ago
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    hmmm for y i get 24 but for red its 7/15 so now what @SmoothMath

  17. AngelDreamGurl
    • 2 years ago
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    ..

  18. AngelDreamGurl
    • 2 years ago
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    @SmoothMath

  19. SmoothMath
    • 2 years ago
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    120* (7/15)

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