probability

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euwe: Newbie | Next Rank: 10 Posts; Posts: 7; Joined: Tue Mar 31, 2009 3:40 am; GMAT Score:650

by euwe » Mon Sep 14, 2009 12:49 am

what is the probability that events A and B both occur?
1. the probability that event A occurs is 0.8
2. the probability that event B occurs is 0.6

with explanation plz

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Source: Beat The GMAT — Data Sufficiency | Mon Sep 14, 2009 12:49 am

GambitOS: Senior | Next Rank: 100 Posts; Posts: 40; Joined: Sat Feb 14, 2009 9:22 am; GMAT Score:460

by GambitOS » Mon Sep 14, 2009 12:56 am

IMO C
What is OA?

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woo: Senior | Next Rank: 100 Posts; Posts: 39; Joined: Sat Jan 03, 2009 11:34 pm

by woo » Mon Sep 14, 2009 3:11 am

IMO E becuase you don't know whether A is independent from B.

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PussInBoots: Master | Next Rank: 500 Posts; Posts: 157; Joined: Tue Oct 07, 2008 5:47 am; Thanked: 3 times

by PussInBoots » Mon Sep 14, 2009 11:30 pm

woo wrote:IMO E becuase you don't know whether A is independent from B.

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