35.2
35.9
36.5
36.8
Answer is Wrong!
Answer is Right!
The correct answer is (b).
The sum of the observations is $50 \times 35.2 = 1760$.
The correct sum is $1760 – 48 + 45 = 1767$.
The correct mean is $\frac{1767}{50} = 35.94$.
Option (a) is incorrect because it is the mean of the incorrect sum.
Option (c) is incorrect because it is the mean of the correct sum plus 1.
Option (d) is incorrect because it is the mean of the correct sum plus 2.