kevincan wrote:

St1: 80+60+90-(AB+BC+CA+ABC)+2ABC + x = 200

Does AB mean A intersect B or A intersect B intersect not C

I think from what you wrote earlier, it means the former.

If this is true, we are NOT given AB+BC+CA+ABC.

I meant former. Ok my bad.

Lets do it again

A+B+C-AB-BC-CA+ABC + NONE = Total

i.e A+B+C-AB-BC-CA+2ABC-2ABC+ ABC + NONE = Total

i.e A+B+C-(AB+BC+CA-2ABC)-2ABC+ ABC + NONE = Total

i.e A+B+C-(AB+BC+CA-2ABC)-ABC+ NONE = Total

St1: We are given (AB+BC+CA-2ABC) = 90

so 80+60+90 - 90 + ABC + x = 200

ABC + x = 60: INSUFF

St2: we are given ABC = 5: Clearly INSUFF

Together:

5 + x = 60

x = 55

Is this correct????

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SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008