Read the following bar graph and fill in the blanks:

The mean strength of classes VI, VII, and VIII is______.

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Solution

The total strength of class VI = $45$
The total strength of class VII= $60$
The total strength of class VIII= $90$
The formula to calculate the mean is
$Mean = \frac{Sum of all observaations}{Total number of observations} = \frac{45 + 60 + 90}{3} = \frac{195}{3} = 65$
Hence, the mean strength of classes VI, VII, and VIII is $65$

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Read the following bar graph and fill in the blanks: The mean strength of classes VI, VII, and VIII is______.

The total strength of class VI =45The total strength of class VII=60The total strength of class VIII=90The formula to calculate the mean isMean=SumofallobservaationsTotalnumberofobservations=45+60+903=1953=65Hence, the mean strength of classes VI, VII, and VIII is 65

Read the following bar graph and fill in the blanks:

The mean strength of classes VI, VII, and VIII is______.