Average of 12 numbers is 15. If a number 41 is also included, then what will be the average of these 13 numbers?

  1. 16
  2. 18
  3. 19
  4. 17

Answer (Detailed Solution Below)

Option 4 : 17
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Detailed Solution

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Average of numbers = Sum of numbers/ Total numbers

Average of first 12 numbers is 15

Sum of 12 numbers = 15 × 12 = 180

New number 41 is to be added

Average of 13 numbers = (Sum of 12 numbers + 13th number)/13

Average = (180 + 41)/13 = 221/13 = 17

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