) A market survey was conducted in four cities to find out the preference for brand 04 A soap. The responses are shown below: Delhi Kolkata Chennai Mumbai Yes 45 55 60 50 No 35 45 35 45 No opinion 5 5 5 5 ( a ) What is the probability that a consumer preferred brand A, given that he was from Chennai? ( b ) Given that a consumer preferred brand A, what is the probability that he was from Mumbai