1.

Mean of 20 observations is 17. if 20 is replaced by 40 in observation. find the new mean​

Answer»

Answer:

18

Step-by-step EXPLANATION:

mean = sum of observations/ total no. of observations

17 = X / 20

x = 17 × 20

x = 340

Thus, sum of observations = 340

when 20 is REPLACED by 40

the sum of observations= 340-20+40=360

new mean = 360/20

= 18

HOPE THIS WILL HELP YOU!



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