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 ?

dsuc.created: 7 years ago | dsuc.updated: 4 years ago

dsuc.updated: 4 years ago

3200

1200

2400

4800

None of them

Bangladesh Bank Bangladesh Bank - Assistant Director - 2012 গণিত পরিসংখ্যান (Statistics)

dsuc.explanation

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common.best_ans:

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

7 years ago

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Md Azizur Rahman

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গণিত

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