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b Three brands of computers have the demand in the ratio 1:1:2 The laptops are preferred from these brands are respectively in the ratio =2:1:1 i) A computer is purchased by a customer among these three brands What is the probability that it is a laptop? ii)A laptop is purchased by 2 customer What are the probabilities that it is from each of the three brands?

iii) Identify the most likely brand preferred to purchase the laptop ?