Question

Vani did a survey of the numbers of brothers and sisters for each of the children in her class with the following results:

0, 1, 5, 3, 6, 4, 0, 0, 1, 2, 3, 1, 0, 1, 5, 4, 2, 1, 3, 3, 2, 1, 0, 1

(a) Make a tally of Vani's results.
How many children have no brothers or sisters?
$\left[3\right]$

(b) The pictograph shows the number of books read by 4 pupils last year.

How many more books were read by Varun than Hemant?
$\left[2\right]$

Answer 1

(a)
Tally table of given data:

No. of siblings	Tally marks	No. of children
0	||||	5
1	|||| ||	7
2	|||	3
3	||||	4
4	||	2
5	||	2
6	|	1

$\left[2\right]$

So five children have no brothers or sisters.
$\left[1\right]$

(b)
Each symbol represents 3 books.
$\therefore$ Varun read $(6\times 3)$ books = 18 books
Hemant read $(4\times 3)$ books = 12 books
$\left[1\right]$
$\therefore$ No. of books read more by Varun than Hemant = 18 - 12 = 6
$\left[1\right]$