The mean of 20 observations in an experiment is 4, lf the observed largest value is 23, find the mean of the remaining observations.
-
A.
4 -
B.
3 -
C.
2.85 -
D.
2.60 -
E.
2.56
Correct Answer: Option B
Explanation
Mean of 20 observations = 4
All the observations = 20 x 4 = 80
Largest observed value = 23
Remaining observation = 80 – 23 = 57
Mean of observation = 57/19 = 3