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




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