Find arithmetic mean from the frequency distribution.

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Solution

Let A = 50, h = 4
Arithmetic mean $(¯ x) = \frac{\sum u_{i} f_{i}}{\sum f_{i}} \times h$
$= 50 + \frac{5}{30} \times 4 = 50 + \frac{2}{3} = 50 - 0.67 = 50.67$
Thus, required A.M. = 50.67

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Find arithmetic mean from the frequency distribution.

Let A = 50, h = 4Arithmetic mean (¯x)=∑uifi∑fi×h=50+530×4=50+23=50−0.67=50.67Thus, required A.M. = 50.67

Let A = 50, h = 4
Arithmetic mean $(¯ x) = \frac{\sum u_{i} f_{i}}{\sum f_{i}} \times h$
$= 50 + \frac{5}{30} \times 4 = 50 + \frac{2}{3} = 50 - 0.67 = 50.67$
Thus, required A.M. = 50.67