the mean of 10 observations is 20 and that of another 15 observations is 16. find the mean of all the 25 observations
Answers
Answered by
15
Heya,
Here is required solution:-
Mean = Sum of the observations / No. of observations.
20 = Sum of the observations/10
Sum of the observations = 200
16 = Sum of the observations / 15
Sum of the observations = 240
Total sum of the observations = 440
Total no. of observations = 25
New mean = 440/25
= 17.6
Hope it helps u............
Here is required solution:-
Mean = Sum of the observations / No. of observations.
20 = Sum of the observations/10
Sum of the observations = 200
16 = Sum of the observations / 15
Sum of the observations = 240
Total sum of the observations = 440
Total no. of observations = 25
New mean = 440/25
= 17.6
Hope it helps u............
Answered by
8
Hey !!
Mean = Sum of the observations / No. of observations.
Mean = 20
No. of observations = 10
Sum of the observations = Mean x No. of observations = 20 x 10 = 200
-----------------------------------------------
Mean = 16
No. of observations = 15
Sum of the observations = 16 x 15 = 240
Total sum of the observations = 200 + 240 = 440
Total no. of observations = 15 + 10 = 25
New mean = 440/25
= 17.6
Mean = Sum of the observations / No. of observations.
Mean = 20
No. of observations = 10
Sum of the observations = Mean x No. of observations = 20 x 10 = 200
-----------------------------------------------
Mean = 16
No. of observations = 15
Sum of the observations = 16 x 15 = 240
Total sum of the observations = 200 + 240 = 440
Total no. of observations = 15 + 10 = 25
New mean = 440/25
= 17.6
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