The mean of 20 observations in an experiment is 4. If the observed largest value is 23, find the mean of the remaining observations.
A
4
B
2.60
C
2.85
D
3
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
Total sum = 20 \times 4 = 80
Remaining sum = 80 – 23 = 57
Remaining observations = 19
Mean = \(\frac{57}{19}\) = 3
Source: Myschool Past Questions Archive (Record #75915)