Look at the following table below- Class Interval Class mark- 0-6 a- 6-12 b- 12-18 15- 18-21 21- -The missing class marks a and b are respectively -

Class mark for a class interval is given by Class mark = Upper class limit+Lower class limit/2 For nbsp; the 1^st class interval , a= 0+6/2=6/2=3. For the 2^n ...

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Standard X

Mathematics

Mean - Grouped Data

Look at the f...

Question

Look at the following table below.
$\begin{matrix} Class Interval & Class mark 0 - 6 & a 6 - 12 & b 12 - 18 & 15 18 - 21 & 21 \end{matrix}$
The missing class marks $a$ and $b$ are respectively ____.

4, 9

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4, 7

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3, 9

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2, 2

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Solution

The correct option is C
3, 9

Class mark for a class interval is given by
$Class mark = \frac{Upper class limit + Lower class limit}{2}$
For the $1^{s t}$ class interval , $a = \frac{0 + 6}{2} = \frac{6}{2} = 3.$
For the $2^{n d}$ class interval, $b = \frac{6 + 12}{2} = \frac{18}{2} = 9.$

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Similar questions

Look at the following table below.
$\begin{matrix} Class Interval & Class mark 0 - 6 & a 6 - 12 & b 12 - 18 & 15 18 - 21 & 21 \end{matrix}$
The missing class marks $a$ and $b$ are respectively ____.

Look at the following table below.

$\begin{matrix} Class interval & Class mark 0 - 10 & A 10 - 20 & B 20 - 30 & 25 30 - 40 & 35 \end{matrix}$

The value of A & B respectively are:

Q. Look at the following table below.

\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}

Fill in the blanks with the class marks of the corresponding class intervals.

Look at the following table below.
$\begin{matrix} C l a s s i n t e r v a l & C l a s s m a r k 0 - 5 5 - 10 10 - 15 15 - 20 \end{matrix}$

The class-mark for the first and second class intervals are:

Q. Marks of the students of different classes are represented in the table given below :-

Classes	Marks Arrangement
Class A	54 , 69 , 78 , 89 , 43 , 32
Class B	32 , 43 , 54 , 69 , 78, 89
Class C	89 , 78 , 69 , 54 , 43 , 32

Which class(es) has/have the best way of arranging the marks of students?

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Look at the following table below. Class IntervalClass mark0−6a6−12b12−181518−2121 The missing class marks a and b are respectively ____.

The correct option is C 3, 9 Class mark for a class interval is given by Class mark=Upper class limit+Lower class limit2 For the 1st class interval , a=0+62=62=3. For the 2nd class interval, b=6+122=182=9.

Look at the following table below.
$\begin{matrix} Class Interval & Class mark 0 - 6 & a 6 - 12 & b 12 - 18 & 15 18 - 21 & 21 \end{matrix}$
The missing class marks $a$ and $b$ are respectively ____.

The correct option is C
3, 9

Class mark for a class interval is given by
$Class mark = \frac{Upper class limit + Lower class limit}{2}$
For the $1^{s t}$ class interval , $a = \frac{0 + 6}{2} = \frac{6}{2} = 3.$
For the $2^{n d}$ class interval, $b = \frac{6 + 12}{2} = \frac{18}{2} = 9.$