Question
Average age of company A is 21 years and average age of
both companies A and B is 13 years. If the ratio of number of employees in company A and B is 3:8, then what is the average age of company B?Solution
Average of Company B = (11 × 13 - 3 × 21)/8 => (143 - 63)/8 = 80/8 = 10 years
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