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Question

The average of 12 numbers is 39. If the number 52 is also included, then what will be the average of these 13 numbers?

The correct answer is

40

Total of 12 numbers = 12 × 39 = 468
Add 52 → New total = 468 + 52 = 520
Average = 520 ÷ 13 = 40

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Important Questions from Average

  1. Find the mean marks of the following distribution.
    Marks obtainedNo. of students
    255
    306
    353
    401
  2. The average of first 169 even numbers is
  3. The average weight (in kg) of a family of five members whose weights are 40 kg, 49 kg, 56 kg, 74 kg and 35 kg is:
  4. The average of first 152 odd natural numbers, is:
  5. The average runs scored by a batsman in 23 matches is 40. In the next 10 matches, the batsman scored an average of 16 runs. Find his average runs scored (rounded off to two decimals) in all the 33 matches.

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