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is3535

  • one year ago

A bag contains 3 red marbles, 5 yellow marbles, and 4 blue marbles. One marble is chosen at random. What is the probability that the chosen marble will be blue?

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  1. is3535
    • one year ago
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    @Vocaloid

  2. Vocaloid
    • one year ago
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    how many blue marbles are there? how many total marbles are there?

  3. is3535
    • one year ago
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    4 11

  4. is3535
    • one year ago
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    4 blue and 4+5+3=11

  5. is3535
    • one year ago
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    @Vocaloid

  6. Vocaloid
    • one year ago
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    yes! so, what is the probability of getting blue?

  7. is3535
    • one year ago
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    4 time

  8. Vocaloid
    • one year ago
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    not quite! think of it this way: probability of getting blue = number of blue/number of total marbles

  9. is3535
    • one year ago
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    11

  10. is3535
    • one year ago
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    @Vocaloid

  11. is3535
    • one year ago
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    help

  12. Vocaloid
    • one year ago
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    number blue marbles = ? number of total marbles = ? number of blue marbles/number of total marbles = ?

  13. is3535
    • one year ago
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    4 blue and 11

  14. Vocaloid
    • one year ago
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    right! so what is the number of blue marbles/the number of total marbles?

  15. is3535
    • one year ago
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    4/11

  16. Vocaloid
    • one year ago
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    yeah

  17. is3535
    • one year ago
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    so that my answer

  18. Vocaloid
    • one year ago
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    yes

  19. is3535
    • one year ago
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    |dw:1432839463131:dw|

  20. is3535
    • one year ago
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    |dw:1432839500961:dw|

  21. is3535
    • one year ago
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    @Vocaloid

  22. is3535
    • one year ago
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    @Vocaloid

  23. Vocaloid
    • one year ago
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    oh, I'm sorry, you made a mistake earlier! how many total marbles are there? your original answer was wrong and I didn't see it what is 3 + 5 + 4? it's not 11

  24. is3535
    • one year ago
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    @Vocaloid now what 12

  25. is3535
    • one year ago
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    12

  26. is3535
    • one year ago
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    1/12

  27. is3535
    • one year ago
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    |dw:1432839664784:dw|

  28. Vocaloid
    • one year ago
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    ok! now try the probability again how many blue marbles are there? how many total marbles are there? what is the probability of getting a blue marble?

  29. Vocaloid
    • one year ago
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    I'm sorry, I didn't catch your mistake earlier

  30. is3535
    • one year ago
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    45+4 +3 = 12 4 blue

  31. is3535
    • one year ago
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    it will be 1/12

  32. Vocaloid
    • one year ago
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    please try again probability of getting a blue marble = number of blue marbles/number of total marbles

  33. is3535
    • one year ago
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    4/12

  34. is3535
    • one year ago
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    4/1

  35. is3535
    • one year ago
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    1/4

  36. is3535
    • one year ago
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    @Vocaloid

  37. Vocaloid
    • one year ago
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    please try again: 1. how many blue marbles are there? 2. how many total marbles are there? what is the number of blue marbles DIVIDED by the number of total marbles?

  38. Vocaloid
    • one year ago
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    |dw:1432839886465:dw|

  39. is3535
    • one year ago
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    4 divided 11= 3

  40. is3535
    • one year ago
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    1/3 is my answer

  41. Vocaloid
    • one year ago
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    yes! 4/12 = 1/3 you're done

  42. is3535
    • one year ago
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    ty

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