1 . A researcher computed the mean , median and standard deviation for a set of performance score . If 5 were to be added to each score , which of these three statistics would change ?
  • A. The mean only
  • B. The median only
  • C. The standard deviation only
  • D. The mean and median only
  • E. The mean and the standard deviation only
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Bangladesh Bank - Assistant Director - 2011
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2 . 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 ?
  • A. 3200
  • B. 1200
  • C. 2400
  • D. 4800
  • E. None of them
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3 . A car travels 15 meters in one second . What is the speed of the car per hour in kilometer ?
  • A. 54
  • B. 48
  • C. 42
  • D. 36
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4 . A zookeeper counted the heads of the animals in a zoo and found it to be 80. When he counted the legs of the animals he found it to be260. If the zoo had either pigeons or horses, how many horses were there in the zoo?
  • A. 40
  • B. 30
  • C. 50
  • D. 60
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5 . In a zoo, there are Rabbits and Pigeons. It heads are counted s, there are 200 and if legs are counted there are 580. How many pigeons are there ?
  • A. 90
  • B. 100
  • C. 110
  • D. 120
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সমন্বিত ৬ (ব্যাংক) ও ২ টি আর্থিক প্রতিষ্ঠান - সিনিয়র অফিসার ১০.০৬.২০১৯
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