Answers

2014-03-17T21:24:23+05:30
Sigma means summation of numbers.
0
Sigma means adding or addition. We use this sigma symbol in finding Mean .
2014-03-17T21:34:44+05:30
 Σ It is represented by given  Σ. It means mathematical sum... means... if you are given 45,54564,44,65,4 so  Σ means sum of all (45,54564,44,65,4)
0