IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => IGCSE/ GCSE => Math => Topic started by: moon on October 26, 2009, 08:15:49 am

Title: HELP igcse Math Jun. 06 ppr 2
Post by: moon on October 26, 2009, 08:15:49 am

Plz help to solve Q no.17(b) Jun. 09 I know the answer from mark scheme but I don't know why. thanks

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: @d!_†oX!© on October 26, 2009, 08:21:01 am

adi but he said june 09

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: astarmathsandphysics on October 26, 2009, 08:22:43 am

june 06 or june 09?

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: Ghost Of Highbury on October 26, 2009, 08:22:59 am

oh..hell sry..i have gone dyslexic...reading 9 as 6

will post it soon

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: Ghost Of Highbury on October 26, 2009, 08:28:05 am

find the image attached

actually, u can do it without using all those lines and protractor...its just 90⁰

but for ur understanding...i drew the lines too..

hope u understand

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: adorabledaughter_07 on October 26, 2009, 08:32:09 am

yea...jus join all de pointz to (4,4), measure 90degrees, measur de distance, nd plot de points ...don! :)

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: moon on October 26, 2009, 08:32:32 am

Sorry, I meant Jun. 06 Q no. 17 (b)

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: Ghost Of Highbury on October 26, 2009, 08:33:51 am

june 2009...i solved it in ur other post..

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: ~~~~shreyapril~~~~ on October 26, 2009, 08:35:42 am

hey moon u want a or b or both??

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: Ghost Of Highbury on October 26, 2009, 08:38:46 am

n(AUB)= n(A) + n(B) - n(AnB)

here n(AUB) = 29

n(A) = 18

n(B) = 11

therefore n(AnB) = 0

so they both are distinc sets

no intersection

refer to the markscheme for the diagram

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: moon on October 26, 2009, 08:39:24 am

Thanks a lot I got it. :)

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: ~~~~shreyapril~~~~ on October 26, 2009, 08:40:20 am

ans for a is in the image below:

as they have told (A U B)' = 0 so the one in box will be 0

as they have told B is completley belonging to A that is A is the universal set for B and n(B) = 11 and n(A) = 18

so n(B)' = 18-11
           =  7

hope you get this!!!  ::) ::)

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: ~~~~shreyapril~~~~ on October 26, 2009, 08:41:41 am

good one aadi
i was also going to answer it but then i saw u doing it!!

so i did a instead of b

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: @d!_†oX!© on October 26, 2009, 08:49:48 am

Quote from: | am | on October 26, 2009, 08:28:05 am

find the image attached

actually, u can do it without using all those lines and protractor...its just 90⁰

but for ur understanding...i drew the lines too..

hope u understand

dude what software do u use to make these graphs>>>>

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: ~~~~shreyapril~~~~ on October 26, 2009, 08:51:10 am

which graphs???
th one he used for 09 paper????
i guess he told me abt using some ms math or something like taht
it is a free software i guess!!