Represent the following data using frequency curve: Electricity bill in a month (in Rs.) 200 – 400 400 – 600 600 - 800 800 – 1000 No. of Families 362 490 185 63

2. Represent the following data using frequency curve:

Electricity   bill in  a  month (in Rs.)	200 – 400	400 – 600	600  - 800	800 – 1000
No. of Families	362	490	185	63

Solution :

For drawing a frequency curve without histogram, the class mark preceding he first class is 100 with frequency zero and the class mark succeeding the last class is 1100 with frequency zero.

Electricity bill in  a month (in Rs. )	Class mark	No. of Families.
0 – 200	100	0
200 – 400	300	362
400 – 600	500	490
600 – 800	700	185
800 – 1000	900	63
1000 – 1200	1100	0