Banking / Data Interpretation

Average sample question

Read the question, answer, option analysis and revision tip before taking a timed mock.

By Sarkari Engine Editorial DeskLast updated 20 July 2026Reviewed for independent exam-practice use

Question

Sales over four days are 40, 50, 60 and 70 units. What is the average sale?

  1. A. 50
  2. B. 55
  3. C. 60
  4. D. 65

Correct answer

Option B: 55

Add the values: 40 + 50 + 60 + 70 = 220. Divide by 4 days. The average is 55 units.

Why the other options are wrong

  • 50 ignores the higher values.
  • 60 is above the true average and may come from using only middle values incorrectly.
  • 65 is too high for the given set.

Practice tip

In DI, write total and count before selecting the option. This prevents mental averaging mistakes.

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