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  1. Eugene99

    Mathematics: Post your doubts here!

    i) No. of ways to chose a group: 13C10 x 12C9 x 6C4 x 7C4 = 33033000 or 33000000 (correct to 3 sf) ii) No of ways of arranging 10 sopranos = 6P6 x 5P5 = 86400 iii) No of arrangement of 4 tenors and 4 basses with given condition: 2 ( 4P4 x 3P3) = 288
  2. Eugene99

    Ultimate selfishness

    Ultimate selfishness
    • Eugene99
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  3. Eugene99

    You never know! only know when you need something

    You never know! only know when you need something
    • Eugene99
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  4. Eugene99

    I stopped believing in humanity long time ago

    I stopped believing in humanity long time ago
  5. Eugene99

    https://www.dropbox.com/s/1ovq8a4hgiuj80u/A%20LEVEL%20Economics%20Revision%20Guide.pdf?dl=0

    https://www.dropbox.com/s/1ovq8a4hgiuj80u/A%20LEVEL%20Economics%20Revision%20Guide.pdf?dl=0
    • Eugene99
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  6. Eugene99

    Why will I ever need something? :/

    Why will I ever need something? :/
    • Eugene99
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  7. Eugene99

    Economics Revision Guide coming 23 minutes later

    Economics Revision Guide coming 23 minutes later
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  8. Eugene99

    A' Level Registrations for May/June 2016

    From which email you got a reply from British Council? I replied to the same email they sent me the provision SOE, and it has been 9 days but still no response
  9. Eugene99

    I had been one of ur friends??? can't believe!

    I had been one of ur friends??? can't believe!
    • Eugene99
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  10. Eugene99

    Oh! just reminds me u had to leave after a month, two months ago! xD

    Oh! just reminds me u had to leave after a month, two months ago! xD
    • Eugene99
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  11. Eugene99

    A level Biology: Post your doubts here!

    thank you:)
  12. Eugene99

    A level Biology: Post your doubts here!

    INdeed I do understand, thanks a lot but wait, what will happen to NH when hydrolysis occur, seems like an H will combine with N and OH will combine C=O, am i right?
  13. Eugene99

    A level Biology: Post your doubts here!

    I have no idea at what point amino acid are hydrolyzed!
  14. Eugene99

    Physics: Post your doubts here!

    I think CIE is going to sue us for all the ebook priating! The publishers won't be happy and it means a lot of loss for them
  15. Eugene99

    Physics: Post your doubts here!

    you know that strange website doesn't open in Pakistan! :p
  16. Eugene99

    Physics: Post your doubts here!

    where did you get that from? :p
  17. Eugene99

    Physics: Post your doubts here!

    nope, I got the hard copy
  18. Eugene99

    Chemistry: Post your doubts here!

    it just forms a blackish water after mixing :( could my aldehyde be stale since I have it for almost a year, Tollen's reagent I just bought recently
  19. Eugene99

    9701 Chemistry AS

    Paper 1 on 8th June P2 on 4th May and P3 on 24th May
  20. Eugene99

    Chemistry: Post your doubts here!

    Reaction of aldehyde with Tollen's reagent makes silver mirror inside the test tube. But when I mixed Tollen's reagent with aldehyde, and heated it up, only black precipitate appeared, no silver mirror, why?
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