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  1. W

    What grades u xpecting overall???!!

    ohk.. i heard that in nov_09, A* was 95+ percentile. but this from this year onwards it will be 90+ percentile. so i was kinda confused. anyways thanks :)
  2. W

    What grades u xpecting overall???!!

    but when 90 is the percentile it meanx A* should be same as previous A grade nah.... as it is the same percentile system and only name of 90+ pecentile has changed to A*
  3. W

    What grades u xpecting overall???!!

    best of luck guys...i wanted to know that whether these predictions like 58 for p3 is for A or A*?? i am still confused with this grading system
  4. W

    math p3 question... please help

    this is nov 03 q7
  5. W

    math p3 question... please help

    The complex number u is given by u =(7 + 4i)/(3 − 2i). (i) Express u in the form x + iy, where x and y are real. (ii) Sketch an Argand diagram showing the point representing the complex number u. Show on the same diagram the locus of the complex number z such that !z-u! = 2 (iii) Find the...
  6. W

    stats paper tomorrow help please

    thanks alot :)
  7. W

    stats paper tomorrow help please

    i cant understand part ii of q7 variant 62 nov 09 The weights, X grams, of bars of soap are normally distributed with mean 125 grams and standard deviation 4.2 grams. (i) Find the probability that a randomly chosen bar of soap weighs more than 128 grams. ans=0.238 (ii) Find the value of k such...
  8. W

    Statistics 1 help required

    u done with its q7 part ii??
  9. W

    Statistics 1 help required

    hey as 39 is the lower quartile and63 upper quartile,, then <39 has probability = 1/4 and < 63 = 3/4 make eqs p(x<39) = 1/4 and p(x<63)=3/4 solve them...... :)
  10. W

    Statistics problem

    for that make use of nCr and nPr formulas.. out of 5 u have to make differnt combinations of 3 5C3 is 10 by doing this u would at least know k how many combos have to be made... dat what i do for such questions
  11. W

    Statistics problem

    probability of getting at least one damaged tape means 1,2,...,n tapes but not zero... so 1 - p(o) = 0.85 p(0) = nC0 (0.2)^0 (0.8)^n it becomes 1 - 0.8^n = 0.85 now solve it to get the value of n
  12. W

    math p3 question... please help

    thanks a bunch man :) ... due to this i cudnt solve many quetions... :D :D
  13. W

    NEED HELP...

    p(x<39)= 1/4 p(z< 39-51/sd) =o.25 solve it and get sd
  14. W

    STATISTICS PROBLEM!!!!

    yeah its p(9.5<x<10.5)
  15. W

    math p3 question... please help

    i am stuck at Q10 part(ii) of november 03 The lines l and m have vector equations r = i − 2k + s(2i + j + 3k) and r = 6i − 5j + 4k + t(i − 2j + k) respectively. Find the equation of the plane containing l and m, giving your answer in the form ax + by + cz = d. markscheme states to calculate...
  16. W

    S1 probability confusions

    THANK YU soo much :)
  17. W

    S1 probability confusions

    i am confued about the terms in probability like what are independent, mutually exclusive and exhaustive events..??
  18. W

    Accounting !!

    i am also taking accounts
  19. W

    math p3 question... please help

    for the intersection of two planes, u always have a line.. for the line equation u need a point and a parallel vector.. this can be done by getting two points on that line.. for those two points..first put any 2 of x y and z = 0 for example i am putting z=0 first in both the plane equations...
  20. W

    math p3 question... please help

    thanks alot planet master :) i am also weak at solving vector questions... any suggestions?? i went through our book but it didnt help..
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