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IGCSE MATHS Doubts

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Ghost Of Highbury:

--- Quote from: Baladya on May 19, 2010, 07:07:52 am ---http://www.freeexampapers.us/IGCSE/Maths/CIE/2008%20Nov/0580_w08_qp_04.pdf

6)b)ii) plzzzz help i dunno how i forgot it right now :S  :-[ :-[ :-[ :-[ :-[

--- End quote ---

okk..heres how u do it..
---------------RULE---------------------------------------------------
if class width = n * standard width, then, height = frequency/n
--------------------------------------------------------------------------
first lets find the standard width...the  height given = 11.5, its frequency is 115
therefore 11.5 = 115/n...=> n = 10
class width = 10 * standard width
2              =  10 * standard width
therefore standard width = 0.2
-----------------------------------------------------
now use this formula with standard width 0.2 to calculate the heights..
height = fequency * (standard width/classwidth)
1st - h = 35 * 0.2/10 = 0.7
2nd - 11.5 (given)
3rd - h = 26 * 0.2/2 = 2.6
4th - h = 24 * 0.2/6 = 0.8

princess12:
mine is 4 hrs as well
why 4 hours 6394
reoly me fast urgently please  ??? ??? ??? ??? ??? ??? ??? ??? ??? ???

6394:
m leavin now
pray for me ppl
INSHAALLAH its gonna b easy 4 all ov us
BEST OF LUCK
 :) ;) :D ;D ::) :P

6394:

--- Quote from: princess12 on May 19, 2010, 07:21:16 am ---mine is 4 hrs as well
why 4 hours 6394
reoly me fast urgently please  ??? ??? ??? ??? ??? ??? ??? ??? ??? ???

--- End quote ---
at de tym i postd 4 hrs wer lft 4 de ppr to start
ohk gud lck
 :) :)

6394:

--- Quote from: 6394 on May 19, 2010, 07:22:47 am ---at de tym i postd 4 hrs wer lft 4 de ppr to start
ohk gud lck
 :) :)


--- End quote ---
u live in uae???????

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