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IGCSE MATHS Doubts

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Vin:

--- Quote from: the golden girl on May 18, 2010, 07:54:53 pm ---

thx dude

--- End quote ---

yea actually i did it the other way round .. im bad at mind calculations ..

Shazizzzle:

--- Quote from: princess12 on May 18, 2010, 07:51:50 pm ---can u explain aadi to me oct 2003 p 4 q 5

--- End quote ---

Q5.
(a)
i) Two cards have D, out of 10, so 2/10 = 0.2
ii)4 cards are red, out of the 10, so 4/10 = 0.4
iii)Remember Probability of A OR B= P(A) + P(B) - P(A intersection B)
 Here, Prob. of being red: 4/10. Prob. of being D: 2/10. Prob. of being Red AND (intersection) D at the same time, is 1/10 (as only ONE card Is both red AND has D)
So prob of red + prob of D - prob of Red and D = 4/10 + 2/10 - 1/10 = 5/10 = 0.5
iv) Prob of red: 4/10 prob the card is D OUT of the red: 1/4
So, prob red X prob of D OUT OF Red = 4/10 X 1/4 = 4/40 = 0.1
v) There is NO CARD THAT IS RED with AN N ON IT. So, ZERO. 0.

princess12:
what about part b aadi in same question

princess12:
thanx
good luck  for maths paper 4 to all

YNWA:
Graphs of functions again. I can't seem to find the markscheme for this one, could someone give me the answers so i can check them?
Oct/Nov 2001 Q.6
(b) (i) (ii) (iii) and (d)

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