The mean of 20 items is 55. If two items 45 and 30 are removed, the new mean of the remaining items is :
A. 65.1
B. 65.3
C. 56.9
D. 56
Answer: Option C
Solution(By Examveda Team)
According to the question,Mean of 20 items is = 55
Sum of 20 items is
= 55 × 20 = 1100
Two items removed
= 45 + 30 = 75
Now, sum of 18 items
= 1100 - 75
= 1025
∴ Average = $$\frac{1025}{18}$$ = 56.9
Related Questions on Average
A. 125 km/hr
B. 75 km/hr
C. 135 km/hr
D. 120 km/hr
Join The Discussion