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In a population of N families, 50% of the families have three children, 30% of the families have two children and the remaining families have one child. What is the probability that a randomly picked child belongs to a family with two children?
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Probability = No of ways it can happen/Total Outcomes =( (3/10)*2 ) / ( (1/2)*3 + (3/10)*2 +1/5 ) = 6/23
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