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Data was collected on a student's typing rate and graph was drawn as shown below. Approximately how many words had this student typed in $$30$$ seconds?

Data represented using circle is known as 

Look at the histogram and answer the following .

For drawing a frequency polygon of a continuous frequency distribution, we plot the points whose ordinates are the frequencies of the respective classes and abscissae are the:

Find the central angle of pie chart for winter.

Class mark of a particular class is 10.5 and class size is 7, then class interval is :

Class mark of class interval 60 - 70 is

If the class marks in a frequency distribution are 19.5, 26.5, 33.5, 40.5, then the class corresponding to the class mark 33.5 is :

The class mark of the class 29.5 $$-$$ 30.5 is :

The class mark of the class 100 $$-$$ 150: