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

Qualification => Subject Doubts => IGCSE/ GCSE => Math => Topic started by: moon on October 26, 2009, 08:02:11 am

Title: HELP igcse Math Jun. 06 ppr 2
Post by: moon on October 26, 2009, 08:02:11 am

plz can you help Jun.06 paper 2 Question 17(b)? 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: Ghost Of Highbury on October 26, 2009, 08:16:18 am

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

here n(AUB) = 29
n(A) = 18

n(B)=11

therefore n(AnB) has to b 0

so they are distinc sets

no intersection

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: moon on October 26, 2009, 08:37:42 am

Thanks a lot

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: Ghost Of Highbury on October 26, 2009, 08:39:49 am

thats k,..

u confused us with 09 and 06..lol..i had to solve both of them

Title: Re: HELP igcse Math Jun. 06 ppr 2
Post by: ~~~~shreyapril~~~~ on October 26, 2009, 08:45:16 am

oye!!!
i guess this is the same thread that was there in queries rite???
why did ya do it twice??