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chemsha bongo!...maths question

Discussion in 'Habari na Hoja mchanganyiko' started by Binti Maringo, Jun 29, 2009.

  1. Binti Maringo

    Binti Maringo JF-Expert Member

    #1
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    Probability question!....anybody?!>:)
    There are 2500 people right!....

    30% of those bought Ford
    20% of those bought Toyota
    10% bought both Toyota and Ford

    If you pick 1 person from those 2500 people, what probability/chances that person will be the one who bought Ford and not Toyota?

    help!......
     
    Last edited: Jun 29, 2009
  2. Tiba

    Tiba JF-Expert Member

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    Niliisha sahau hesabu za probability!!!! Wanaokumbuka wamwage vitu hapa.

    Tiba
     
  3. Binti Maringo

    Binti Maringo JF-Expert Member

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    I hope kuna watu watajitokeza maana hata miye nimesahau kabisa probability ..lazima kutakuwa na vichwa humu ndani!>..anybody! come out come out wherever you are!.....
     
  4. K

    Kituko JF-Expert Member

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    ma mdogo unanikumbusha mbali sana, kuna bwana mmoja anaitwa SO MUCH, nadhani hapo ndio nyumbani
     
  5. Bluray

    Bluray JF-Expert Member

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    2500 universal set

    10% bought F and T thats 250

    30% bought F thats 750, but these include those who bought F and T, so those who bought only F are 750 -250, thats 500

    20% bought T, Thats 500, but these include those who bought F and T, so those who bought only T ARE 500 - 250, THATS 250

    Probability of one person buying F and not T is 500: (2500-250)
    That is 500:2250

    0.22222222222222222222222222222222
     
    Last edited: Jun 29, 2009
  6. Binti Maringo

    Binti Maringo JF-Expert Member

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    My probability says 0.3....and yours is 0.2222 na huwezi approximate 0.2....mmh haya mwingine aje na lake...
     
  7. B

    Babu Swahili Member

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    [​IMG]

    Kelly01,

    Mchoro huo hapo juu kunyambulisha vizuri.

    Kama alivyokokotoa Bluray. Wanaoweza kununu F peke yake ni 500. Sasa Ukiondoa hao 250 wanaoweza kununua F or T, the rest watakuwa denominator ya probability yako.

    Kwa hiyo 500/2250 au 2/9 au 0.22222 ndio probability yako.
     
  8. T

    TanzanianFemale Member

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    Kelly01,

    Blueray and Babuswahili wamepata. Studying for the GMAT?
     
  9. Binti Maringo

    Binti Maringo JF-Expert Member

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    Thank you BS and Bluray!.....

    Yeah i see it should be less than 0.3 since there is 10%.....
     
  10. Lole Gwakisa

    Lole Gwakisa JF-Expert Member

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    Ama kweli duniya yasonga mbele, nilikuwa mkali wa hesabu, sasa hivi najua kuhesabu noti tu!
     
  11. Teamo

    Teamo JF-Expert Member

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    kelly01 leta hesabu yenye akili bwana!
    leta partial derivatives,leta li-hospital's rule,leta maclarean series,leta mambo makubwa bwana!unaleta vitu gani hivyo bwana!?
     
  12. Binti Maringo

    Binti Maringo JF-Expert Member

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    haya G!...subiri nakuletea lingine na uweze kusolve usianze kusubiria kwanza watu waje na majibu yao!......ok...stay tuned...
     
  13. GM7

    GM7 JF-Expert Member

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    Huyu jamaa kanikumbusha miaka miaka ile nilipokuwa msumbufu kwenye hesabu, ila siku nimesahau kidogo, hebu lete chemsha bongo nyingine tujaribu.
     
  14. Bluray

    Bluray JF-Expert Member

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    Leta Poincare's Conjecture.
     
  15. Mwazange

    Mwazange JF-Expert Member

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    Ameeen mkulu.... mwendokasi wa dunia umekuwa mkubwa sana
     
  16. Binti Maringo

    Binti Maringo JF-Expert Member

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    Ok here is another question!.....

    If the price of gasoline increases by 25% and Ron intends to spend only 15% more on gasoline, by what % should he reduce the quantity of petrol that he buys?

    A. 10%
    B. 12.5%
    C. 8%
    D. 12%
    E. 6.66%
     
  17. B

    Babu Swahili Member

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    Kelly01 sasa una cheat....

    Let Original Gas Price = $2
    New Price = 2 + (2 * 0.25) = $2.50

    Let Origanal Quantity = 15 gallons
    Original Total Cost = 15 * 2 = $30
    New Cost = 15 * 2.5 = $37.50

    Ron's Intention
    To Spend = 30 + (30 * 0.15) = $34.50

    So, with the new price ($2.5), he would only get 34.5/2.5 = 13.8 gallons. That is 1.2 gallons less, which means 1.2/15 = 8% reduction of gallons

    Answer = C
     
  18. Madam Koku

    Madam Koku Senior Member

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    Aisee mmenikumbusha hesabu! Long time. Mwl Isack Juma popote ulipo. Heshima yako. Your passion to Math as a teacher was a challenge and motivation to many, including me.
     
  19. P

    Papizo JF-Expert Member

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    Unaweza kufanya hivi swali bila kuchora na kujua jinsi ya kupanga??Pia hili swali la high school!!
     
  20. Madam Koku

    Madam Koku Senior Member

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    I might know the answer but Sipendi kuingilia mambo ya watu na magari yao
    Well i use to like these probability questions. Ila si sasa!
     
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