Question

The mean of 20 observations is 12 . If each of the observation is increased by 5, then find the new mean.

Answer 1

Answer:

Step-by-step explanation:

mean of 20 observation =12

sum of all observation /no of observation =12

sum of all the observation =12×20

sum of all observation =240

when it increase 5 time

240×5 =1200

new mean will be

new sum of all observation /no of observation =mean

1200/200=60

Answer 2

Answer:Mean=340

Step-by-step explanation:Mean=Sum of all obs.÷Total no. of obs.

12=Sum÷20

20*12=Sum

240=Sum

If each no. is increased by 5

Then, 20 *5=100

Then 240+100=340

So the new mean is 340