Question

the mean of 5 observations is 4 find the sum of 5 observations​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

let the no be X

then,we know ,

mean=sum of all observations /total no of observation

4=X+X+X+X+X/5

4=5x/5

X=4

now,sum of all observations is 20