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anonymous

  • 5 years ago

A.)Determine the probability that the sale chosen at random is a house for sale between 3 and 4 years old.... B.) What are the odds that the house is less then 9 years old AGE: # Houses Sold: 1-2 1280 3-4 1580 5-6 1650 7-8 1510 9-10 1500

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  1. anonymous
    • 5 years ago
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    okay, lets do this together. what is the total number of houses?

  2. anonymous
    • 5 years ago
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    7520

  3. anonymous
    • 5 years ago
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    okay, what is the number of houses between 3 and 4 years old?

  4. anonymous
    • 5 years ago
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    1580

  5. anonymous
    • 5 years ago
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    okay. so what is the probability that any one of the 1580 houses will be chosen, given that there are 7520 total houses?

  6. anonymous
    • 5 years ago
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    5940?

  7. anonymous
    • 5 years ago
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    i have no idea

  8. anonymous
    • 5 years ago
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    do you know anything about probability and sample sets?

  9. anonymous
    • 5 years ago
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    not yet

  10. anonymous
    • 5 years ago
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    then why are you doing this problem if you don't know probability?

  11. anonymous
    • 5 years ago
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    because i need to learn how

  12. anonymous
    • 5 years ago
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    okay. then I will explain probability to you. suppose you have a dice. you roll it. what are the chances that it will land on the number 4?

  13. anonymous
    • 5 years ago
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    1/6

  14. anonymous
    • 5 years ago
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    yes. so there are one in 6 chances that the dice will roll 4. what are the chances that the dice will roll an even number?

  15. anonymous
    • 5 years ago
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    1/2

  16. anonymous
    • 5 years ago
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    right. so what were are calling chances, are formally called probability. probability of outcome that you want = set of the outcomes you want/set of all outcomes

  17. anonymous
    • 5 years ago
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    so set of outcomes you want for the dice to roll even number is {2,4,6}. set of all outcomes is {1,2,3,4,5,6}.

  18. anonymous
    • 5 years ago
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    ok i understand...so in relation to that problem

  19. anonymous
    • 5 years ago
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    so what is the set of outcomes you want?

  20. anonymous
    • 5 years ago
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    in my problem?

  21. anonymous
    • 5 years ago
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    I dont know what that means

  22. anonymous
    • 5 years ago
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    okay in the dice problem, the set of outcomes you wanted was of size 3. the set of all outcomes was of size 6. so the probability of even number was 3/6 or 1/2 correct?

  23. anonymous
    • 5 years ago
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    correct

  24. anonymous
    • 5 years ago
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    so what is the desired outcome in your problem?

  25. anonymous
    • 5 years ago
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    I dont know how to figure that out

  26. anonymous
    • 5 years ago
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    its given in the problem. the desired outcome is you choose a house 3-4 years old. so how many houses are 3-4 years old?

  27. anonymous
    • 5 years ago
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    1580

  28. anonymous
    • 5 years ago
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    and what is the set of all outcomes?

  29. anonymous
    • 5 years ago
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    7520?

  30. anonymous
    • 5 years ago
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    right. you have to choose one house and its set is all the houses in that area. So the set size is 7520. so what is the probability that you choose one of the 1580 houses?

  31. anonymous
    • 5 years ago
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    7520/1580...then simplify?

  32. anonymous
    • 5 years ago
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    no no. probability is the set of desired/ total. you have done total/desired.

  33. anonymous
    • 5 years ago
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    probability cannot be greater than 1.

  34. anonymous
    • 5 years ago
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    soo 1580/7520 then simplify

  35. anonymous
    • 5 years ago
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    right.

  36. anonymous
    • 5 years ago
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    okay so .21

  37. anonymous
    • 5 years ago
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    im sure you did the calculation right.

  38. anonymous
    • 5 years ago
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    now, for the other part. what are the odds that you choose a house less than 9 years old?

  39. anonymous
    • 5 years ago
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    what is the desired outcome?

  40. anonymous
    • 5 years ago
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    6020

  41. anonymous
    • 5 years ago
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    i know that it is some number to 75

  42. anonymous
    • 5 years ago
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    okay so desired outcome/total outcome = ?

  43. anonymous
    • 5 years ago
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    6020/7520

  44. anonymous
    • 5 years ago
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    .80

  45. anonymous
    • 5 years ago
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    ok. you have your answers.

  46. anonymous
    • 5 years ago
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    so the answer is what to 75?

  47. anonymous
    • 5 years ago
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    what to 75? what does that mean?

  48. anonymous
    • 5 years ago
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    because in my problem it says what are the odds the house is less then 9 years old....it has a fill in the blank of ? number to 75

  49. anonymous
    • 5 years ago
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    oh okay. then the number you are looking for is 0.8 times 75

  50. anonymous
    • 5 years ago
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    60

  51. anonymous
    • 5 years ago
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    your probability is 0.8. it can be expressed as 4/5 or 80/100 or 60/75 in your case.

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