The mean of 20 items is 55. If two items 45 and 30 are removed, the new mean of the remaining items is
The mean of 20 items is 55
=> Sum of 20 items = 55*20 = 1100
If 45 and 30 are removed
=> New sum = 1100-45-30 = 1025
and number of items remained = 20-2 = 18
=> New mean = $$\frac{1025}{18}$$ = 56.9
Create a FREE account and get:
Detailed syllabus & Topic-wise Weightage
By proceeding you agree to create your account
Free CAT Syllabus PDF will be sent to your email address soon !!!
