mean of 20 observations is 17. If in the observations , observations 40is replaced by 12 then find the new mean .
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1
Answer:
312
Step-by-step explanation:
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Step-by-step explanation:
Since mean of 20 observations is 17
Sum of the 20 observations = 17 x 20 = 340
New sum of 20 observations = 340 – 40 + 12 = 312
New mean=312 / 20 =15.6
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