If the lower and the upper limits of a class interval are 7.5 and 12.5, the class-mark is :

1. 10

2. 2.5

3. 7.5

4. 12.5

In a pie-chart, an angle of 30° represents 80 articles. The number of articles represented by 105° are :

1. 280

2. $22\dfrac{6}{7}$

3. 200

4. none of these

Hundred students from a certain locality use different modes of traveling to school as given below. Draw a bar graph.

Mr. Mirza's monthly income is ₹ 7,200. He spends ₹ 1,800 on rent, ₹ 2,700 on food, ₹ 900 on education of his children, ₹ 1,200 on other things and saves the rest.

Draw a pie-chart to represent it.