Qualification > Math

maths help very very urgent!

(1/2) > >>

godfather93:
someone please explain question Q6) b)ii)?
I'm getting the wrong answer.

astarmathsandphysics:
Am not at home. Can someone else try

godfather93:
someone else please!!

godfather93:
i solved it. thread closed.

Ghost Of Highbury:
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
----------
chk the markscheme for verification
good luck
byee

Navigation

[0] Message Index

[#] Next page