Q5 of 71 Page 204

By taking the assumed mean as 25, find the mean of the following distribution:

Here first we’ll find the class marks -




We’ll first assume a mean A = 25 and here h = 15 - 5 = 10.


Now we’ll find the ui



Now,


Where, = Mean, ui = calculated values of x and fi = frequency for that x.





⇒ = 23.25


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