Question 1 :
For which of these would you use a histogram to show the data?<br/>$(a)$ The number of letters for different areas in a postman's bag.<br/>$(b)$ The height of competitors in an athletics meet.<br/>$(c)$ The number of cassettes produced by $5$ companies.<br/>$(d)$ The number of passengers boarding trains from $7{:}00$ a.m. to $7{:}00$ p.m. at a station.<br/>Give reasons for each.<br/>

Question 2 :
Which Of the following graphs shouldbe used to represent the percentage of boys and girls in a class.

Question 3 :
The relationship between a whole and its part isgraphically represented using ______.

Question 6 :
The probability of an event that is certain to happen is ____?

Question 7 :
To compare the relative growth or decline of two or more series the most appropriate chart to be drawn would be