Question

The mean of 9 observations in a data set is 20. What will the new mean if another observation
30 is added to this data set?​

Answer 1

Answer:

21

Step-by-step explanation:

sum = mean*no .of observations

=9*20=180

180+30=210

mean = 210/10

21

Pls mark brainliest

Answer 2

Answer:

21

Step-by-step explanation:

Given Data

9 observations mean = 20

That's 9 observations sum is = 20*9 = 180

New observation is added = 180+30

New mean of 10 Observations = 210/10 = 21

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