Question

the mean of 20 observation is 24 if 3 is added to each number find the new mean​

Answer 1

Answer:

New mean = 27

Step-by-step explanation:

The mean of 20 observation is 24

Mean = Sum of all the numbers / Numbers of observation

Numbers = 20   ( as 20 observations )

Mean = 24 given

24 = Sum / 20

=> Sum = 24 * 20

=> Sum = 480

Now 3 is added to each number so

20 * 3 = 60 is increased

So new sum = 480 + 60 = 540

New Mean = New Sum / Number of Observations

New Mean = 540 /20

=> New mean = 27