Mean for an Ungrouped Data

Q.

Find the mean of the first five even natural numbers?

Q.

Find the average of the first $20$ natural numbers.

Q.

The mean of first 10 natural numbers is ______.

1. 4.5

2. 5.5

3. 6.5

4. 5

Q.

The following numbers represent the ages of people on a bus.
3, 6, 27, 13, 6, 8, 12, 20, 5, 10.
Calculate their mean of their ages.

1. 10

2. 110

3. 12

4. 11

Q.

Find the mean of the first $10$ whole numbers?

Q.

Find the mean of the first five whole numbers.

Q.

Find the mean of the first twelve natural numbers.

Q.

Find the mean of the first ten natural numbers.

Q.

Find the mean of these set of numbers – 100, 1050, 320, 600 and 150.

1. 333
2. 444
3. 222
4. 440

Q.

Find the mean of the integers $-54,-32,-70,-25,-65,-42$.

Q.

The mean of the following numbers is ___.
2, 6, 4, 9, 7, 3, 5, 4, 3, 7

Q.

Find the mean of 9, 10, 8, 9, 12, 10. [2 MARKS]

Q. Find the mean of 56, 34, 89, 13.

1. 18
2. 58
3. 28
4. 48

Q.

The mean of 6 numbers is 27 and the mean of first 4 numbers is 24. Find the fifth number, given that the sixth number is 30.

1. 34

2. 36

3. 37

4. 35

Q.

What is the mean of first $10$ natural numbers?

Q.

The mean of 5 observations is 12. If the mean of the first 3 is 10, then the mean of the other two is ___ .

Q.

The mean of first 10 whole numbers is:

1. 4.5

2. 5.5

3. 6.5

4. 4.5

Q. Find the mean of 17, 21, 12, 5, 3, 2.

1. 18
2. 20
3. 5
4. 10

Q. Question 12
Mean of 50 observations was found to be 80.4. But later on, it was discovered that 96 was misread as 69 at one place. Find the correct mean.

Q. Following table shows the points of each player scored in four games:

$\begin{array}{ccccc}Player& Game& Game& Game& Game\\ & 1& 2& 3& 4\\ Suraj& 10& 16& 14& 10\\ Abhijit& 8& 0& 4& 6\\ Harshith& 13& Didnot& 11& 8\\ & & Play& & \end{array}$

Based on the above table answer the following questions:

(i) Find the mean to determine Suraj's average number of points scored per game.

(ii) To find the mean number of points per game of Harshith, would you divide the total points by 3 or by 4? Why?

(iii) Abhijit played in all the four games. How would you find the mean?

(iv) Who is the best performer? [4 MARKS]

Q.

The mean of 6, 8, 11, 13, 14 and x is 66. Find the value of the observation x ___.

Q.

Find the mean.

$$\begin{array}{cccccc}Observation& 3& 6& 7& 9& 10\\ frequency& 8& 10& 15& 9& 8\end{array}$$

__

Q.

The mean of first 10 natural number is:

1. 4.5

2. 5.5

3. 6.5

4. 5

Q. If the mean of five observations $x,x+2,x+4,x+6andx+8$ is $11$, then the mean of first three observations is:

1. 8
2. 6
3. 9
4. 4

Q. Find the average of 10, 20, 30, 40, 50.

1. 30
2. 20
3. 40
4. 50

Q. The height of 5 students (in cm) are as below.
{140, 145, 130, 135, 150}
Their mean value is .

1. 125 cm
2. 140 cm
3. 145 cm
4. 150 cm

Q.

The mean of the first 10 natural numbers is 55.

1. True

2. False

Q. Find the difference between the arithmetic means of all even and odd numbers between 50 and 60.

1. 2
2. 0
3. 1
4. 3

Q. The height of 5 students (in cm) are as below.
{140, 145, 130, 135, 150}
Their mean value is .

1. 125 cm
2. 140 cm
3. 145 cm
4. 150 cm

Q. If 37a = 37b = 5661, what is the average of a and b?

1. 74.5
2. 76.5
3. 151
4. 153