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In 2007, the arithmetic mean of the annual incomes of Rahim and Karim was Taka 3800 . The arithmetic mean of the annual incomes of Karim and Ripon was Ripon and Rahim was TaKa5800. What is the arithmetic mean of the incomes of the three ?

Correct Answer: 4800
(Rahim + karim)/2 + (Karim + ripon)/2 + (Ripon + Rahim)/2 = 3800 + 4800 + 5800 So, (Rahim + Karim + Ripon)/3 = 14400/3 = 4800

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