class 10. statistics formula

Why statistics ?

60 students of Section A of Class XI, obtained 40 mean marks in Statistics, 40 students of Section B obtained 35 mean marks in Statistics. Find out mean marks in Statistics for Class XI as a whole.

The following are the marks obtained by 30 students of Class XI in Statistics. Prepare a frequency distribution by taking a class interval of 5 on exclusive basis.

Statistical Tools

Nature Of Statistics