If the mean of 10 observations is
20 and that of another 15
Observations is 16. Find mean
mean of all 25 observations
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0
Answer:
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Answered by
1
Answer:
17.6
Step-by-step explanation:
Mean of 10 observation = 20
Sum of 10 observation = 20×10
=200
Mean of 15 observation = 16
Sum of 15 observation = 16×15
= 240
Sum of both observation =200+240
= 240
Mean = 440/25
= 17.6
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