Question

3. The mean of 30 numbers is 18. Find new mean if
each observation is increased by 3.​

Answer 1

Answer:

The mean will be increased by 3 i.e. the new mean will be 21

:

Answer 2

Answer:

Sum of 30 observations is 30×18=540.....if each

number is increased by 3 the sum is 540+30×3=630.new mean is 600/30=30

Step-by-step explanation:

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