Question

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

• A. NA
• B. Electricity bill in a month (in Rs. ) Class mark No. of Families.
  0- 200 100 0
  200- 400 300 362
  400- 600 500490
  600- 800700185
  800 -100090063
  1000- 120011000
• C. Electricity bill in a month (in Rs. )Class markNo. of Families.
  0- 2001000
  200- 400300362
  400- 600500490
  600- 800700185
  800 -150090063
  1000- 120011000
• D. Electricity bill in a month (in Rs. )Class markNo. of Families.
  0- 2001000
  200- 400300362
  400- 600500490
  600- 800700185
  800 -100090055
  1000- 120011000

Answer 1

Answer: (B)

Electricity bill in a month (in Rs. ) Class mark No. of Families.

0- 200 100 0
200- 400 300 362
400- 600 500490
600- 800700185
800 -100090063
1000- 120011000

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.

$Electricitybillinamoth(inRs.)$	$Class-mark$	$No.offamilies$
$0-200$	$100$	$0$
$200-400$	$300$	$362$
$400-600$	$500$	$490$
$600-800$	$700$	$185$
$800-1000$	$900$	$63$
$1000-1200$	$1100$	$0$