Question

Then mean of 100 observations is 24.If 4 is added to each of the observations and then each of them is multiplied by 2.5 then new mean is

Answer 1

Answer:

70

Step-by-step explanation:

Sum of all observations = 100*24=2400

By adding 4 with each observation = 4*100=400

Now the new sum of observation = 2400+400=2800

Now each of them is multiplied by 2.5

Hence, new sum of all observation becomes 2800*2.5= 7000

Hence mean of 100 observation is 7000/100=70