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HELP igcse Math Jun. 06 ppr 2

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moon:
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. ???

Ghost Of Highbury:
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

moon:
Thanks a lot

Ghost Of Highbury:
thats k,..

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

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

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