The lower limit and upper limit of an exclusive class interval are $15$ and $25$ respectively. Then the class mark is _____

26.5

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20

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28

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27

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Solution

The correct option is B $20$
Let $M$ be the class mark
$M = \frac{Lower limit + Upper limit}{2} = \frac{15 + 25}{2} = 20$

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Q. For class interval

20 - 25

, write the lower class limit and the upper class limit.

Under Exclusive method,

(a) the upper class limit of a class is excluded in the class interval

(b) the upper class limit of a class is included in the class interval

(d) the lower class limit of a class is included in the class interval

If the class mark of a class interval is 25, then the sum of its lower and upper class limits is

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The lower limit and upper limit of an exclusive class interval are 15 and 25 respectively. Then the class mark is _____

The correct option is B 20Let M be the class mark M=Lower limit+Upper limit2=15+252=20

The lower limit and upper limit of an exclusive class interval are $15$ and $25$ respectively. Then the class mark is _____

The correct option is B $20$
Let $M$ be the class mark
$M = \frac{Lower limit + Upper limit}{2} = \frac{15 + 25}{2} = 20$