The graphical techniques that can be used to represent nominal data are

The data relating to employed and unemployed persons in six different States can most appropriately be represented by which of the following?

Which one of the following is NOT a graphical presentation of a frequency distribution?

For histogram based on a frequency distribution with unequal class intervals the frequency of a class should be proportional to the ______ of the rectangle representing the class.

The sum of the digits of a two-digit number is 9. If the digits of the number are reversed, the new number formed is 45 more than the original number. What is the original number?

The sum of digits of a 2-digit number is 12. When the digits are reversed, the number becomes greater by eighteen. What is the difference between the digits in the number ?