The mean of two groups of 15 and 20 observations are 20 and 25 respectively . Find the mean of all 35 observations.
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6
Answer:
22.8
Step-by-step explanation:
sum of 15 observations 300
sum of 20 observations 500
total sum 800
mean of 35 observations 800/35
=22.8
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1
Answer:
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