Question

The average of 25 observations is 13.It was later found that an observation 73 was wrongly entered as 48. Find the new average

Answer 1

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Here is your answer
Average = Sum of Numbers/Total numbers

Sum of 25 numbers= 25 × 13
= 325

Now 73 was wrongly entered as 48 so

New Sum of 25 numbers = 325 - 48 + 73
= 350

New Average = New Sum of Number/Total Number
$= \frac{350}{25} \\ = 14$
Therefore
New Average is 14


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