if the mean of 4 observations is 20 when a constant 39 c 39 is added t | Examsbook

199

Q:
If the mean of 4 observations is 20, when a constant 'C' is added to each observation, the mean becomes 22. The value of C is:

1
6
2
2
3
3
4
5

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Answer : 4. "5"

Maths Average Problems

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