The class nbsp- mark of class interval 25-30 is -22-5-27-5-30-25-

The correct option is B 27.5 The class mark of the class interval is given by upper nbsp;class nbsp;limit + lower nbsp;class nbsp;limit/2 Upper class l ...

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Byju's Answer

Standard VIII

Mathematics

Tabulation and Interpretation of Ungrouped Data

The class n...

Question

The class mark of class interval 25-30 is ______

22.5

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27.5

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Solution

The correct option is B
27.5

The class mark of the class interval is given by $\frac{upper class limit + lower class limit}{2}$

Upper class limit = 30; Lower class limit = 25

Hence, Class Mark = $\frac{30 + 25}{2}$

= 27.5

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Draw a histogram representing the above data.

The class size of a distribution is 25 and the first class- interval is 200- 224. There are seven class - intervals.
(i) Write the class - intervals.
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The class mark of class interval 25-30 is ______

Q. Match the two columns

\begin{matrix} C o l u m n - I & C o l u m n - I I (A) T h e c l a s s m a r k o f t h e c l a s s i n t e r v a l & (p) 13 145 - 150 i s (B) I n a f r e q u e n c y d i s t r i b u t i o n, t h e m i d - v a l u e o f a & (q) 110 c l a s s i s 10 a n d w i d t h o f e a c h c l a s s i s 6. T h e u p p e r l i m i t o f t h e c l a s s i s (C) T h e m e a n o f e i g h t n u m b e r s i s 40. I f o n e & (r) 22.5 - 27.5 n u m b e r i s e x c l u d e d, t h e i r m e a n b e c o m e s 30. T h e e x c l u d e d n u m b e r i s (D) T h e c l a s s m a r k s o f a f r e q u e n c y d i s t r i b u t i o n a r e & (s) 147.5 15, 20, 25, 30, \dots \dots T h e c l a s s c o r r e s p o n d i n g t o t h e c l a s s m a r k 25 i s \end{matrix}

Choose the correct option:

Q. Which of the following is the class mark of class interval 25 - 30?

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The class mark of class interval 25-30 is ______

The correct option is B 27.5 The class mark of the class interval is given by upper class limit + lower class limit2 Upper class limit = 30; Lower class limit = 25 Hence, Class Mark = 30+252 = 27.5

The correct option is B
27.5

The class mark of the class interval is given by $\frac{upper class limit + lower class limit}{2}$

Upper class limit = 30; Lower class limit = 25

Hence, Class Mark = $\frac{30 + 25}{2}$

= 27.5