The average of no observation is 40. If one observation of value 80 is added, then the average of all the observations is 41. What is the value of n?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 39
| Understanding/Application |
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Given: Average of n observation = 40 New member = 80 unit New average = 41 Old average = New average - (New member/Average of n observation) = 41 - (80/40) = 41 - 2 = 39 |