Average

Q. Find the mean of:

iii. First five odd natural numbers

Q.

Find the mean of first five natural numbers.

Q.

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

Q.

The price of four cars are given below. Which of the following options represents the cars arranged in descending order of their prices?

Car	Price
A	₹989098
B	₹1000800
C	₹899998
D	₹900800

1. D > C > B > A

2. B > A > D > C

3. B < A < D < C

4. A < C < B < D

Q. Find the average of 18, 20, 24, 26, and 22.

1. 20
2. 22
3. 24
4. 26

Q.

The mean of $10$ numbers is $32$. If one number is excluded , the mean of the remaining number becomes $30$ . Find the excluded number.

Q. The average of 10 numbers is 7. What will be the new average if each of the numbers is multiplied by 8?

1. 45
2. 52
3. 56
4. 55

Q. Three group of 10 kids. The average weight of a kid in each group is 35 kilograms. One more kid joined each group.
i) The average weight of a kid in the first group is still 35 kilograms.(2 mark)
ii) The average weight of a kid in the second group is now 36 kilograms. (2 marks)
iii) The average weight of a kid in the third group is now 34 kilograms. Compute the weight of the new kid in each group.(1 marks)

Q.

There are 50 students in a class and the average mark scored by the class in Maths is 65 out of 100. The total marks scored by all the students except Karan and Arjun is 3080. If the marks scored by Karan & Arjun are same, what is the marks scored by Arjun?

1. 75

2. 80

3. 85

4. 90

Q.

The mean of $6$ numbers is $22$. If one number is excluded the mean becomes $23$. what is the excluded number?

Q.

The mean of six numbers is $23$. If one of the numbers is excluded, the mean of the remaining numbers is $20$. Find the excluded number

Q. The average marks of eight students increase by $21$ when a new student comes in place of one of them whose marks were $96$. Find the marks of the new student​.

1. $85$
2. $264$
3. $117$
4. $234$

Q. Ram scored 553 marks out of 700 and Gita scored 486 marks out of 600 in Science. Whose performance is better?

Q. Given below is the data for the amount of wheat produced in a village for 4 days of a week arranged in a tabular form:

Day	Production (in kgs)
Monday	1000
Tuesday	1250
Wednesday	1500
Thursday	1350

How much is the production of wheat on Wednesday higher than the average wheat production for the 4 days?

Q.

If a website gets 2, 880 hits in a day, what is its average number of hits per hour?

1. 130

2. 290

3. 145

4. 120

Q.

Find the mean of first $10$ even natural numbers.

Q. Estimate the difference of $64,478\text{and}24,735$ to the nearest thousand.

1. $39,743$
2. $39,000$
3. $40,000$
4. $41,000$

Q. The average of 5 numbers is 25. If 10 is added to each number, then find the new average ?

Q. The mean, median, and mode of a data set are $33.667,34$, and $35$, respectively. Find out which data set follows these.

1. $30,32,33,35,35,36$
2. $33,34,29,35,36,35$
3. $32,33,31,35,36,35$
4. $35,35,34,30,30,31$

Q. What is the average of a data set?

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

Q. Choose the correct answer from the alternatives given.
Directions for question 71 to 75: Study the following table carefully and answer the questions given below.
Number of Students Enrolled
With Five Colleges over the Years

Year/College	A	B	C	D	E
2004	450	320	400	480	520
2005	480	350	380	500	540
2006	420	300	410	520	460
2007	460	360	430	470	480
2008	470	340	390	530	530

What is the average number of students enrolled in the college A over the years?

1. $456$
2. $460$
3. $464$
4. $452$

Q. Which of the following gives the complete stem-and-leaf plot and the mean of the given data?

1. 
2. 
3. 
4. 

Q. The mean, median, and mode of the data set $40,40,142,51,68,85,65,57$ is given below.
Mean: $68.5$
Median: $61$
Mode: $40$
Which is the best measure that represents the data?

1. Mean
2. Mode
3. None of these
4. Median

Q.

If a website gets 2, 880 hits in a day, what is its average number of hits per hour?

1. 130

2. 290

3. 145

4. 120

Q. $A$'s age is twice as $B$'s. $4$ years ago, $A$ was three times as old as $B$. Find their ages.

1. $12$ years and $8$ years
2. $16$ years and $8$ years
3. $17$ years and $6$ years
4. $19$ years and $6$ years

Q.

The mean of $5$ numbers is $18$. If one number is excluded, their mean is $16$. Find the excluded number.

Q. George's average(arithmetic mean) score on the first four English tests of the semester is $92$. If he earns a score of $77$ on the fifth test, calculate his new average.

1. $84.5$
2. $86.0$
3. $88.0$
4. $87.5$
5. $89.0$

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

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

Q.

The mean of $100$ items was found to be $64$. Later on, it was discovered that two items were misread as $26$ and $9$ instead of $36$ and $90$ respectively. Find the correct mean.

Q. Fill in the blanks.
No. 34/4 7th February, 2015
........................................
Mr. J.K. Saxena, Manager (Credits), Friends Colony branch is transferred to the Regional Office on the same rank and pay. He shall hand over charge to the Chief Manager and report at the Regional Office by 10th February, 2015.
Sd/-
Personnel Officer.

1. Office Order
2. Office Circular
3. Public Notice
4. None of above