NDA Math Statistics
Show Para
For the next three (03) items that follow:
The mean and standard deviation of 100 items are 50, 5 and that of 150 items are 40, 6 respectively.
The mean and standard deviation of 100 items are 50, 5 and that of 150 items are 40, 6 respectively.
[NDA I 2014]
© examsiri.com
Question : 96 of 100
Marks:
+1,
-0
What is the combined mean of all 250 items ?
[NDA I 2014]
Go to Question: