Arithmetic Mean

Q.

The mean of first 10 even natural numbers is ___

Q. The mean of three natural numbers is

1. closer to the first number
2. closer to the third number
3. the middlemost number
4. closer to the larger number

Q.

If the mean of16, 24, x, 23, 20 is 18.Then find x

Q.

Arun scored 36 marks in English, 44 marks in Hindi, 75 marks mathematics and x marks in science. If his average marks is 50, find the value of x.

1. 60

2. 35

3. 52

4. 45

Q. The runs scored by a batsman in 10 matches are given below. Calculate the average runs scored by the batsman.


45, 35, 17, 13, 26, 24, 75, 25, 50, 50

1. 36
2. 30
3. 25
4. 37

Q. The middle most observation in a data set is called Mean

1. True
2. False

Q. The mean of first three whole numbers is

1. 1
2. 1.5
3. 0
4. 0.5

Q.

If each observation of the data is decreased by 8 then their mean

1. remains the same

2. is decreased by 8

3. is increased by 5

4. becomes 8 times the original mean

Q.

Find the arithmetic mean of the following data:

2, 3, 4, 5, 6, 7, 8, 9

___.

Q.

If the arithmetic mean of two positive numbers is $A$, their geometric mean is $G$ and harmonic mean is $H$, then $H$is equal to

1. $\frac{G^2}{A}$

2. $\frac{G}{A^2}$

3. $\frac{A^2}{G^2}$

4. $\frac{A}{G^2}$

Q.

The average of all the perfect squares up to $100$is?

Q. The arithmatic Mean is also called as _______.

1. Average
2. Mode
3. Median
4. Central

Q.

The average marks scored by Ajay in certain number of tests is 84. He scored 100 marks in his last test. If his average score of all these tests is 86, then the total number of tests he appeared is ____.

1. 8
2. 7
3. 9
4. 10

Q. From a school, 90 boys and 30 girls appeared for a public examination. The average marks of boys is found to be $45\%$ whereas the average marks of girls is $70\%$. What is the school average?

1. $61.50\%$
2. $51.25\%$
3. $40.50\%$
4. $51.52\%$

Q.

The mean of 5 observatons $x+3,x+5,x+7,x+9,x+11$ is 14. Find the value of x.

1. 5

2. 7

3. 8

4. 6

Q. The height of 10 students, measured in cm are as follows:
143, 132, x, 139, 128, 135, 151, 146, 141, 149.
If mean of the given information is 141.4 cm, then find the value of x.

1. 150 cm
2. 141 cm
3. 142 cm
4. 151 cm

Q.

Find the difference between the mean and range of the following data set:

12 86 45 78 23 56

1. 24

2. 0

3. 74

4. 50

Q.

Given below is the table of the marks of 10 students. For getting promoted to section A, a student has to score more marks than the average. Can you tell me from the given options, which student will not be promoted to Section A?​

$\begin{array}{cccc}\text{Name}& \text{Marks}& \text{Name}& \text{Marks}\\ \text{Pavani}& 79& \text{Ajit}& 77\\ \text{Goutham}& 81& \text{Kushagra}& 73\\ \text{Deepthi}& 68& \text{Manish}& 94\\ \text{Pavan}& 85& \text{Satyam}& 81\\ \text{Akash}& 62& \text{Sarosh}& 80\end{array}$

1. Sarosh

2. Deepthi

3. Pavani

4. Goutham

Q. Mean, Median and Mode of the data is called____.

1. Spread
2. Central Tendency
3. Observation
4. Range

Q.

The average monthly salary of 20 workers in an office is ₹ 45900. If the manager's salary is added, the average salary becomes ₹ 49200 per month. Find the manager's monthly salary.

1. ₹115200

2. ₹182000

3. ₹121000

4. ₹105200

Q. Vidya and pratap went for a picnic. Their mother gave them a water bottle that contained 5 litres of water. Vidya consumed $\frac{2}{5}$ of the water. Pratap consumed the remaining water.
What fraction of the total quantity of water did pratap drink?

Q. If the arithmetic mean of two numbers a and b, is five times their geometric mean, a+b/a-b is equal to

Q.

Find the mean of the squares of the first seven whole numbers.

1. 10
2. 13
3. 91
4. 50

Q. For the given data the average lies between the highest and the_____.

1. maximum value
2. extreme value
3. middle value
4. lowest value

Q.

.The reason scientists repeat measurements they take during experiments is so that they can

1. check whether the instruments used are inaccurate

2. list the measurements taken in a table.

3. take the average and reduce the possibility of an error.

4. get more than one answer.

Q. The mean of 20, 30, 40, 20 ___, 10 is 25. Find the missing number.

1. 40
2. 30
3. 20
4. 10

Q. What is the average of a data set?

1. $\frac{\text{Number of all the observations}}{\text{Sum of observations}}$
2. $\frac{\text{Product of all the observations}}{\text{Number of observations}}$
3. $\frac{\text{Sum of all the observations}}{\text{Number of observations}}$
4. $\frac{\text{Number of all the observations}}{\text{Product of observations}}$

Q.

Find the mean of the following data:

$1,3,5,7,9,11,13,15$

Q. Sachin scored twice as many runs as Rahul. Together, their runs fell two short of a double century. How many runs did each one score ?

Q.

Find the difference between the mean and range of the following data set.
12, 86, 45, 78, 23, 56

1. 0
2. 24
3. 74
4. 50