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  1. mominzahid

    Mathematics: Post your doubts here!

    I dont understand it.. :$ can u please explain just this basic concept to me that ur applying in part 2 and 3? :(
  2. mominzahid

    Mathematics: Post your doubts here!

    Im so gonna flunk tomorrows exam.. :'( i suck at perms/combs.. :/
  3. mominzahid

    Mathematics: Post your doubts here!

    can some please please explain the 2nd part? how do we calculate the number of combinations for both albert and tracy to be on the committee?
  4. mominzahid

    People who have given SAT's..

    Yes is it possible if u can appear for both at once? i mean speaking realistically can u prepare for both? say if i were to give them in this oct?
  5. mominzahid

    Mathematics: Post your doubts here!

    cant expect much from my teacher i dont get him.. :/ saw khan academy videos they were a bit helpful.. i'll try again.. thanks for ur help.. :)
  6. mominzahid

    Mathematics: Post your doubts here!

    i dont get itt.. :'( i think i have problem in the basic concept of applying these factorials and permutations and combinations.. :/
  7. mominzahid

    Mathematics: Post your doubts here!

    please explain the 4th and 5th part of the same questionn.. :/
  8. mominzahid

    Mathematics: Post your doubts here!

    hey check this question out.. in part 2 u do 4!/2! right? how to solve part 1 using this factorial method? it gets me confused when to use the factorials and when to use nPr.. :/
  9. mominzahid

    Mathematics: Post your doubts here!

    Hahah... just figured u know so much there's a good chance u might be a teacher.. ;)
  10. mominzahid

    Mathematics: Post your doubts here!

    Ahh... thankss.. :D will get back to u with more problems.. :D are u a teacher or a student?
  11. mominzahid

    Mathematics: Post your doubts here!

    can i ask a really dumb question? :P u keep referring to 'fi' what does it mean? :P is it the probability?
  12. mominzahid

    Mathematics: Post your doubts here!

    But why do we subtract 1? :/
  13. mominzahid

    Mathematics: Post your doubts here!

    meanwhile can u please explain the encircled step in the marking scheme of this question? i cant understand it. :(
  14. mominzahid

    Mathematics: Post your doubts here!

    Yupp.. you didd... i was using the same method but the answer was wrong somehow. :/ lemme try it agn and get back to u. ;)
  15. mominzahid

    Mathematics: Post your doubts here!

    Ahh got ittt... Thanksss.. :D i posted a histogram question above please explain that aswell? ur a lifesaver. :D
  16. mominzahid

    Mathematics: Post your doubts here!

    someone please explain how to calculate the mean and standard deviation using a histogram? i cant understand the ms..:'(
  17. mominzahid

    Mathematics: Post your doubts here!

    for aii the MS says 3 digit odd 500+ = 4 ways 3 digit odd 600+ = 3 × 2 = 6 ways 4 digit odd 1000+ = 4 ways 4 digit odd 3000+ = 4 ways 4 digit odd 5000+ = 4 ways 4 digit odd 6000+ = 6 ways OR 4 digit odd, last digit in 3 ways, 2 nd to last in 3 ways, 2 nd in 2 ways first in 1 way = 18...
  18. mominzahid

    Mathematics: Post your doubts here!

    Ahh... that i understoood... :D thanks bro.. :D can u also please explain the question posted above by ???
  19. mominzahid

    Mathematics: Post your doubts here!

    yes please someone explain this.. :/
  20. mominzahid

    Mathematics: Post your doubts here!

    I still dont get it.. :S ok forget that question im too dumb to understand it lol..:/ can u please explain this how we find the standard deviation?
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