Calculate the mean of the following frequency distribution.

Which of the following is not a measure of central tendency?

1. Mean

2. Mode

3. Range

4. Median

If the mean of 7, 5, 13, x and 9 be 10, then the value of x is :

1. 10

2. 12

3. 14

4. 16

In a monthly test, the marks obtained in Mathematics by 16 students of a class are as follows :

0, 0, 2, 2, 3, 3, 3, 4, 5, 5, 5, 5, 6, 6, 7, 8

The arithmetic mean of the marks obtained is :

1. 3

2. 4

3. 5

4. 6