question_answer 17)

Number of children in six different classes are given below. Represent the data on a bar graph.

Class	Number of Children
Fifth	135
Sixth	120
Seventh	95
Eighth	100
Ninth	90
Tenth	80

(a) How would you choose a scale? (b) Answer the following questions: (i) Which class has the maximum number of children? And the minimum? (ii) Find the ratio of students of class sixth to the students of class eighth.

Answer:

                (a) Start the scale at 0. The greatest value in the data is 135, so end the scale at a value greater than 135, such as 140. Use equal divisions along the axes, such as increments of 10. We know that all the bars would lie between 0 and 140. We choose the scale such that the length between 0 and 140 is neither too long nor too small. Here, we take 1 unit for 10 children. (b) (i) Fifth class has the maximum number of children. Tenth class has the minimum number 'of children. (ii) Ratio of students of class sixth to eighth \[=120:100=\frac{12}{100}=\frac{6}{5}=6:5\]