Question

the mean of hundred observations is 50 if one of the observation which was 50 is replaced by 150 find the resulting mean​

Answer 1

Answer:

51

Step-by-step explanation:

mean of 100 obs = 50

=> sum of the 100 obs = 50*100

                                     = 5000

now we replace 50 by 150 in the obs list,

=> the sum, now = 5000 - 50 +100

                           = 5100

therefore, the mean now

= 5100/100

= 51