The class - mark of class interval 10-15 is _____________

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12.5

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11.5

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Solution

The correct option is B
12.5

The class mark of the interval is the value midway between the acutal lower limit and the actual upper limit.

In the given class interval , the lower limit = 10

And the upper limit = 15

Hence the class mark = $\frac{10 + 15}{2}$

= $\frac{25}{2}$

= 12.5

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The class - mark of class interval 10-15 is _____________

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$\begin{matrix} C l a s s i n t e r v a l & C l a s s m a r k 0 - 5 5 - 10 10 - 15 15 - 20 \end{matrix}$

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The class - mark of class interval 10-15 is _____________

The correct option is B 12.5 The class mark of the interval is the value midway between the acutal lower limit and the actual upper limit. In the given class interval , the lower limit = 10 And the upper limit = 15 Hence the class mark = 10+152 = 252 = 12.5

The correct option is B
12.5

The class mark of the interval is the value midway between the acutal lower limit and the actual upper limit.

In the given class interval , the lower limit = 10

And the upper limit = 15

Hence the class mark = $\frac{10 + 15}{2}$

= $\frac{25}{2}$

= 12.5