chemsha bongo!...maths question | JamiiForums | The Home of Great Thinkers

# chemsha bongo!...maths question

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

1. ### Binti MaringoJF-Expert Member

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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. ### TibaJF-Expert Member

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Jun 29, 2009
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Niliisha sahau hesabu za probability!!!! Wanaokumbuka wamwage vitu hapa.

Tiba

3. ### Binti MaringoJF-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. ### KitukoJF-Expert Member

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

5. ### BlurayJF-Expert Member

#5
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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 MaringoJF-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 SwahiliMember

#7
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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

### TanzanianFemaleMember

#8
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Kelly01,

Blueray and Babuswahili wamepata. Studying for the GMAT?

9. ### Binti MaringoJF-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 GwakisaJF-Expert Member

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

11. ### TeamoJF-Expert Member

#11
Jun 29, 2009
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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 MaringoJF-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. ### GM7JF-Expert Member

#13
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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. ### BlurayJF-Expert Member

#14
Jun 29, 2009
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Leta Poincare's Conjecture.

15. ### MwazangeJF-Expert Member

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Ameeen mkulu.... mwendokasi wa dunia umekuwa mkubwa sana

16. ### Binti MaringoJF-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 SwahiliMember

#17
Jun 30, 2009
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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

#18
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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. ### PapizoJF-Expert Member

#19
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Unaweza kufanya hivi swali bila kuchora na kujua jinsi ya kupanga??Pia hili swali la high school!!