Question

Given below is the bar graph indicating the marks obtained out of $$50$$ in mathematics paper by $$100$$ students. Read the bar graph and answer the following questions:
It is decided to distribute work books on mathematics to the students obtaining less than $$20$$ marks, giving one workbook to each of such students. If a work book costs Rs. $$5$$, what sum is required to buy the work books?

Answer 1

Correct option is A. Rs. $$195$$
Let us prepare a chart of the $$100$$ students using the data from the bar graph.

Marks	Number of Students
$$0 − 9$$	$$27$$
$$10 − 19$$	$$12$$
$$20 − 29$$	$$20$$
$$30 − 39$$	$$24$$
$$40 − 49$$	$$17$$

Number of students with less than $$20$$ marks $$= 27 + 12 = 39$$

$$\therefore\,$$ Required sum to buy the workbooks $$=\ Rs. 5 \times 39 =\ Rs. 195$$