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The mean of 6 observations is 12. Two observations are added to these and the new mean becomes 13. Mean of two new observations:A. 16B. 18C. 13D. 151. D2. B3. C4. A |
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Answer» Correct Answer - Option 4 : A Given: The mean of 6 observations = 12 New mean after adding two observations = 13 Calculation: Sum of 6 observations = 6 × 12 = 72 Total observations after adding two more observations = 8 Sum of 8 observations = 8 × 13 = 104 Sm of two new observations = Sum of 8 observations - sum of 6 observations Sum of teo new observations = 104 - 72 = 32 Mean of the two observations = 32/2 = 16 ∴ Mean of two new observations is 16. |
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