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anonymous

  • one year ago

The figure below shows a shaded rectangular region inside a large rectangle:

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    What is the probability that a point chosen inside the large rectangle is not in the shaded region?

  3. welshfella
    • one year ago
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    first find the area of the unshaded part = area of whole rectangle - shaded part

  4. welshfella
    • one year ago
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    can you do that?

  5. anonymous
    • one year ago
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    yes

  6. anonymous
    • one year ago
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    24

  7. welshfella
    • one year ago
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    ok then the required probability = area unshaded / area whole rectangle - as simple as that.

  8. anonymous
    • one year ago
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    ok please check my answer though..hold on :)

  9. welshfella
    • one year ago
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    no 24 is the area of shaded part ( 4*6*

  10. anonymous
    • one year ago
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    yes thats what i meant

  11. welshfella
    • one year ago
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    so what is the area of the outer unsshaded part?

  12. anonymous
    • one year ago
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    50?

  13. welshfella
    • one year ago
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    No thats the area of the whole triangle - the shaded + unshaded

  14. anonymous
    • one year ago
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    so its 30 right? for the unshaded part

  15. welshfella
    • one year ago
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    |dw:1437590676443:dw|

  16. welshfella
    • one year ago
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    (5*10) - (6*4) = 50 - 24 = ?

  17. anonymous
    • one year ago
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    26

  18. welshfella
    • one year ago
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    right so what is the probability of the point being in the outer unshaded part?

  19. anonymous
    • one year ago
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    26%

  20. welshfella
    • one year ago
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    no check my third post

  21. anonymous
    • one year ago
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    ok so im confused...what do i do then with 26?

  22. welshfella
    • one year ago
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    probability = area of unshaded part / area of the whole recatngle this will give you a fraction to get a percent you multiply it by 100.

  23. welshfella
    • one year ago
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    area unshaded = 26 , area of whole = 50

  24. welshfella
    • one year ago
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    probability = area of unshaded / area of whole = 26/50

  25. anonymous
    • one year ago
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    i got 0.52, sry my mom was calling me lol :b @welshfella

  26. anonymous
    • one year ago
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    so its 52% right?

  27. welshfella
    • one year ago
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    yes

  28. anonymous
    • one year ago
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    ok thank you!!!

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