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zarkam21

  • one year ago

Help again! :]

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  1. zarkam21
    • one year ago
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  2. phi
    • one year ago
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    out of 10 orange and 4 blue, what is the chance of picking an orange?

  3. zarkam21
    • one year ago
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    10/4 right?

  4. phi
    • one year ago
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    you want the fraction (number that match) divided by total number (number that match means the number that are orange)

  5. zarkam21
    • one year ago
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    Which would calculate to 2.5

  6. zarkam21
    • one year ago
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    or 0.4

  7. phi
    • one year ago
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    total number in the bag is not 4 (as a check, a "probability of 1" is the most you can get)

  8. zarkam21
    • one year ago
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    Because the total number of oranges is 10

  9. zarkam21
    • one year ago
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    0.4 is the correct answer =}

  10. phi
    • one year ago
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    there are 10 orange and 4 blue. how much is that total?

  11. zarkam21
    • one year ago
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    14

  12. phi
    • one year ago
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    so what is the chance of picking an orange ?

  13. zarkam21
    • one year ago
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    10/14

  14. zarkam21
    • one year ago
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    5/7

  15. phi
    • one year ago
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    yes, or 5/7 we are not done. assuming we picked an orange one first, what is now in the bag ?

  16. zarkam21
    • one year ago
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    9 orange and 4 blue?

  17. phi
    • one year ago
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    yes. and what is the chance of picking a blue one now ?

  18. zarkam21
    • one year ago
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    4/13 ?

  19. phi
    • one year ago
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    yes. and the chances of picking orange, then a blue is found by multiplying the probabilities 5/7 * 4/13 they want a decimal , rounded to nearest 100th. Time for a calculator

  20. zarkam21
    • one year ago
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    0.22?

  21. phi
    • one year ago
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    yes

  22. zarkam21
    • one year ago
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    Thank you so much! I really appreciate it! :]

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