1.

The mean of 22 observations is 10. Two more observations are included and the new mean becomes 11. The mean of two new observations is:1). 192). 203). 214). 22

Answer»

Total sum of 22 observations = 22 × 10 = 220

When two more observations are included and the new MEAN becomes 11,

⇒ Total sum of 24 observations = 24 × 11 = 264

⇒ Difference of observations = 264 – 220 = 44

∴ Mean of two new observations is = 44/2 = 22.


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