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anonymous

  • one year ago

a box contains five one dollar bills, nine five dollar bills, ten ten dollar bills, and nine twenty dollar bills. what is the expectation if one bill is selected. $10.00 $9.00 $11.00 $12.00

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  1. Loser66
    • one year ago
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    Please, post the original question by scanning. The options are not the correct one because it doesn't link to the problem.

  2. anonymous
    • one year ago
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    what do you mean?

  3. dan815
    • one year ago
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    |dw:1435147951289:dw|

  4. dan815
    • one year ago
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    tells you the money on average per bill

  5. Loser66
    • one year ago
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    dan, expectation mean probability, right?

  6. dan815
    • one year ago
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    expectation is the mean of this set yes

  7. Loser66
    • one year ago
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    so, the options should be % form, right?

  8. dan815
    • one year ago
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    its the mean of {1,1,1,1,1,5,5,5,5,5,5,...5,10,10,10...10,20,20,20,20..,20} its mean of that set

  9. dan815
    • one year ago
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    no its not a probability, it is the mean value

  10. Loser66
    • one year ago
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    ok, I should shut up to learn more, hehehehe... I am waiting for your explanation, please

  11. dan815
    • one year ago
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    thats it, its how to find average of these numbers

  12. dan815
    • one year ago
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    here is a simpler example if u have a set {1,2,2,3,3,3,4} what is the expected value?

  13. dan815
    • one year ago
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    to do that you would add up all the numbers and divided by the number of numbers

  14. dan815
    • one year ago
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    same thing with this example

  15. dan815
    • one year ago
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    we are just finding average of this set

  16. anonymous
    • one year ago
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    so if I pull one bill whats my answer or how do I figure it out?

  17. dan815
    • one year ago
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    |dw:1435148300369:dw|

  18. anonymous
    • one year ago
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    that was painfully simple.

  19. Loser66
    • one year ago
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    But it is simple to the person who knows it like dan, not to me.

  20. dan815
    • one year ago
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    hahah u know it too

  21. dan815
    • one year ago
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    this is the theory behind finding average height of function and center x and y of areas

  22. anonymous
    • one year ago
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    The book never went over that in the chapter, I have no idea how I was supposed to know it.

  23. dan815
    • one year ago
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    center of masses

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