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  1. salvatore

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20%289702%29/9702_s09_qp_2.pdf No. 2 (b i).. it is a relatively simple question, but I'm kinda confused. Change in momentum = momentum before - momentum after collision right? So why did the marking...
  2. salvatore

    ~~jokes?? in here?? really??

  3. salvatore

    Mathematics: Post your doubts here!

    I got it now.. thanks a lot guys :)
  4. salvatore

    Mathematics: Post your doubts here!

    Thank you for your reply.. I don't get one point here.. if the twins are there, won't the combination be 7C2 (of the girls) X 6C2 (of the boys)? Why have you omitted the combination of the girls? :)
  5. salvatore

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w12_qp_63.pdf Could anyone please help me with qn no. 6 (a)? I don't understand the marking scheme. Thanks PhyZac Dug
  6. salvatore

    ~~jokes?? in here?? really??

  7. salvatore

    Mathematics: Post your doubts here!

    I'm getting the concept now.. Thanks a lot for giving your time man :)
  8. salvatore

    Mathematics: Post your doubts here!

    Thanks a lot for your help bruv.. much appreciated. I don't understand a few things though: For the first part, why can't I solve it this way: P(X=1) = (1/6) => (1/6)^9? (Since only one 3 out of 6 => 1/6) For part (ii), is there any other way apart from log to solve for the value of n? I'm...
  9. salvatore

    Mathematics: Post your doubts here!

    I'm reposting this.. anyone?
  10. salvatore

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_s11_ms_61.pdf Qn no. 7 - whole question. Please help me solve the question above.. I'm totally confused! :(
  11. salvatore

    ~~jokes?? in here?? really??

  12. salvatore

    Mathematics: Post your doubts here!

    Yeah.. I figured it out. Thanks :)
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