R. D. Sharma Solutions for Chapter: Data Handling – I (Collection and Organisation of Data), Exercise 1: EXERCISE

The final marks in mathematics of $30$students are as follows:

$\begin{array}{l}53,61,48,60,78,68,55,100,67,90\\ 75,88,77,37,84,58,60,48,62,56\\ 44,58,52,64,98,59,70,39,50,60\end{array}$

Which observations between $50$ and $60$ have not actually appeared$?$

Following figures relate the weekly wages (in $₹$) of$15$workers in a factory:

$300,250,200,250,200,150,350,200,250,200,150,300,150,200,250$

Prepare a frequency table.

How many workers are getting the minimum wages$?$

Construct a frequency distribution table for the following marks obtained by $25$ students in a history test in class $\mathrm{VI}$ of a school:

$9, 17, 12, 20, 9, 18, 25, 17, 19, 9, 12, 9, 12, 18, 17, 19, 20, 25, 9, 12, 17, 19, 19, 20, 9$

What is the range of marks?
 

Construct a frequency distribution table for the following marks obtained by $25$ students in a history test in class $\mathrm{VI}$ of a school:

$9, 17, 12, 20, 9, 18, 25, 17, 19, 9, 12, 9, 12, 18, 17, 19, 20, 25, 9, 12, 17, 19, 19, 20, 9$

What is the highest mark?
 

Construct a frequency distribution table for the following marks obtained by $25$ students in a history test in class $\mathrm{VI}$ of a school:

$9, 17, 12, 20, 9, 18, 25, 17, 19, 9, 12, 9, 12, 18, 17, 19, 20, 25, 9, 12, 17, 19, 19, 20, 9$

Which mark is occurring more frequently$?$

 In a mathematics test following marks were obtained by $40$ students of class$\mathrm{VI}$.

$\begin{array}{cccccccccc}8& 1& 3& 7& 6& 5& 5& 4& 4& 2\\ 4& 9& 5& 3& 7& 1& 6& 5& 2& 7\\ 7& 3& 8& 4& 2& 8& 9& 5& 8& 6\\ 7& 4& 5& 6& 9& 6& 4& 4& 6& 6\end{array}$

Find how many students obtained marks equal to or more than $7$?

 In a mathematics test following marks were obtained by $40$ students of class$\mathrm{VI}$.

$\begin{array}{cccccccccc}8& 1& 3& 7& 6& 5& 5& 4& 4& 2\\ 4& 9& 5& 3& 7& 1& 6& 5& 2& 7\\ 7& 3& 8& 4& 2& 8& 9& 5& 8& 6\\ 7& 4& 5& 6& 9& 6& 4& 4& 6& 6\end{array}$

How many students obtained marks below $4$?

Following is the choice of sweets of$30$students of class$\mathrm{VI}:$

Ladoo, Barfi, Ladoo, Jalebi, Ladoo, Rasgulla, Jalebi, Ladoo, Barfi, Rasgulla, Ladoo, Jalebi, Jalebi, Rasgulla, Ladoo, Rasgulla, Jalebi, Ladoo, Rasgulla, Ladoo, Rasgulla, Jalebi, Ladoo, Rasgulla, Ladoo, Ladoo, Barfi, Rasgulla, Rasgulla, Ladoo.

Which sweet is preferred by most of the students$?$