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  1. daredevil

    A level Statistics doubt??Post your doubts here!

    yaar i got the answer up until getting (b/0.15)=+/- 1.281 but after that i'm not getting the limits... i mean we have to cross multiply here ryt?? did u get this far?
  2. daredevil

    A level Statistics doubt??Post your doubts here!

    yeah thats it... the probabiility of tyre having this pressure is 0.256 so of all 4 it will be 0.256*0.256*0.256*0.256 [its an AND case so all prob will mulitply] that is how the answer is (0.256)^4
  3. daredevil

    A level Statistics doubt??Post your doubts here!

    ooo i did the stupidest mistake evvaar!! i toook 1.92 as standard deviation i dont know y :O >__<
  4. daredevil

    A level Statistics doubt??Post your doubts here!

    i get the idea for the second bar as take this : (1.9-b) < X < (1.9+b) find the expressions for z1 and z2 equate z2-z1 with 0.8 0.8 is ur probability as they have given 80% and that means 0.8 if we write it as deimals... i didnt get the corect answer for he first part so i didnt give this...
  5. daredevil

    A level Statistics doubt??Post your doubts here!

    i cant even get the right answer for the first part -__- i am getting 0.0208 z1 = (1.82-1.9)/1.92 z2 = (1.92-1.9)/1.92 z2-z1 this is wat i did. is it not right?? o.O
  6. daredevil

    thanks Anika ^_^ i believe so :)

    thanks Anika ^_^ i believe so :)
  7. daredevil

    A level Statistics doubt??Post your doubts here!

    yeahhh it does happen ryt?!! :| and that sucks wen it happens..... i hope i dont have that moment in the exam room X( yeah BOL! :D (y) i will IA ... u pray for me too :)
  8. daredevil

    Mathematics: Post your doubts here!

    np man... anika already helped out. thanks anyways (y) and Good Luck for tommorow
  9. daredevil

    A level Statistics doubt??Post your doubts here!

    thankks alot.... that P(A intersection B) was wat i was missing on.. like i knew it had to be there .... but cudnt figure where it was -_-
  10. daredevil

    Mathematics: Post your doubts here!

    This is the question syed1995 Anika Raisa
  11. daredevil

    Mathematics: Post your doubts here!

    i dnt have the link .. its in my past paper topical and the address of the papr is not given. but i'll try to send a picture of it. wait
  12. daredevil

    Mathematics: Post your doubts here!

    ok look here: P(A) = 1/3 P(B) = 5/9 are these events mutually exclusive?? plz give an explnation too like working and all cz i'm not sure if i'm doing it ryt... also explain if they are independant events... and are they exhaustive events... again with the working and stuff. thanks a lot :)
  13. daredevil

    Mathematics: Post your doubts here!

    oooh thanks... i was thinking about subtracting some but lost my bearings so couldn't wrap my head around wat to subtract even though it was pretty clear... thanks a bunch (y)
  14. daredevil

    Mathematics: Post your doubts here!

    so they havent made class boudaries here?! :O
  15. daredevil

    Mathematics: Post your doubts here!

    ok i'm pretty sure i did this question for my mocks prep but i am totall null blank ryt now :O if anyone answers then tag me too .... it just isnt hitting me -_-
  16. daredevil

    Mathematics: Post your doubts here!

    u know about these class boundaries and stuff our sir told us that we can either subtract and add respectively to the 1st and the second value or we cud just add 1 to the second one or subtract one from the first one... just have to make a difference with 1. and given this question i dont think...
  17. daredevil

    Mathematics: Post your doubts here!

    but the marks cannot be in negative :O
  18. daredevil

    yeah i guess :D

    yeah i guess :D
  19. daredevil

    Mathematics: Post your doubts here!

    i thikn it will be like for the first one: 0=< x < 10 include the first value and not the last one.... there can be no decimals i think bcz there are marks
  20. daredevil

    well one can wish... and u just popped my bubble NO FIAR :/ :P

    well one can wish... and u just popped my bubble NO FIAR :/ :P
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