The numbers of Science, Arts and Commerce graduates working in a company are 30, 70 and 50 respectively. If these figures are represented by a pie chart, then what is the angle corresponding to Science graduates?

For a histogram based on a frequency distribution with unequal class intervals, the frequency of a class should be proportional to:

The co-efficient of correlation is independent of:

The following tables gives the frequency distribution of number of peas per pea pod of 198 pods:

Number of peas	1	2	3	4	5	6	7
Frequency	4	33	76	50	26	8	1

What is the median of this distribution?