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The mean of 20 observations is 7 if each observation is multiple by 3 and then 5is added to it then the mean of the new data set is

The mean of 20 observations is 7 if each observation is multiple by 3 and then 5is added to it then the mean of the new data set is

Grade:12th pass

2 Answers

Nagaraju Illuri
31 Points
6 years ago
 
 
 
 We know,
       Sum of observations/ no of observations =mean
        Given,
      No of observations=20 and mean is 7
   So, sum of observations =140
   If      Each observation is multiplied with 3  and then 5 is added then , sum of observations=425
         No of observations =21 then mean=20.2
Lalit bhagwan Sonawane
13 Points
2 years ago
the mean of a set 10 observation is 4 another set of 20 observation is added to it which makes the mean of the combined set equal to 6.the mean of second set is

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