Question

Find mean of following distribution

Class interval... 10-25/25-40/40-55/55-70/70-85/85-100

Ncert problem

Answer 1

Hloo... dear...!!!

here is ur answer....

Answer 2

To find : Mean

Explanation:

class interval     fi         xi               fixi

10-25                  2        17.5             35

25-40                 3        32.5           97.5

40-55               7          47.5            332.5

10-25                6         62.5            375

10-25                6         77.5            465

10-25                6          92.5           555          

total fi = 30

total fixi = 1860

now ,

mean = $\frac{\sum f_ix_i}{\sum f_i}$

mean = $\frac{1860}{30}$

mean = 62

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