Average MCQ for SSC CGL, CHSL, CPO, MTS & GD Exams

The average weight of $3$ men A, B and C is $84$ kg. Another man D joins the group and the average now becomes $80$ kg. If another man E whose weight is $3$ kg more then that of D, replaces A, then the average weight of B, C, D and E becomes $79$ kg. Then weight of A is

The average weight of $8$ persons increases by $2.5$ kg when a new person comes in place of one of them weighing $65$ kg. The weight of the new person is

A man bought $13$ articles at Rs. $70$ each, $15$ at Rs. $60$ each and $12$ at Rs. $65$ each. The average price per article is

The average monthly expenditure of a family is Rs $2$,$200$ during first three months, Rs $2$,$550$ during next four months and Rs $3$,$120$ during last five months of the year. If the total savings during the year was Rs $1$,$260$, what is the average monthly income?

If average of $20$ observations $x1$, $x2$, ....., $x20$ is y, then the average of $x1$ - $101$, $x2$ - $101$, $x3$ - $101$, ....., $x20$ $-101$ is

The average of $30$ numbers is $40$ and that of other $40$ numbers is $30.$ The average of all the numbers is

The average of $10$ numbers is $7.$ If each number is multiplied by $12$, then the average of the new set of numbers will be

The average weight of A, B and C is $45$ kg. If the average weight of A and B be $40$ kg and that of B and C be $43$ kg, then the weight (in kg) of B is

The average of all the numbers between $6$ and $50$ which are divisible by $5$ is

The average of the marks obtained in an examination by $8$ students was $51$ and by $9$ other students was $68.$ The average marks of all $17$ students was:

There are two groups A and B of a class, consisting of $42$ and $28$ students respectively. If the average weight of group A is $25$ kg and that of group B is $40$ kg, find the average weight of the whole class.

The average of $20$ numbers is $15$ and the average of first five is $12.$ The average of the rest is

The average weight of five persons sitting in a boat is $38$ kg. The average weight of the boat and the persons sitting in the boat is 52kg. What is the weight of the boat?

$12$ kg of rice costing Rs. $30$ per kg is mixed with $8$ kg of rice costing Rs. $40$ per kg. The average per kg price of mixed rice is

Total weekly emoluments of the workers of a factory is Rs. $1534.$ Average weekly emolument of a worker is Rs. $118.$ The number of workers in the factory is:

The average of x numbers is $y^{2}$ and the average of y numbers is $x^{2.}$ So the average of all the numbers taken together is

Find the average of $1.11$, $0.01$, $0.101$, $0.001$, $0.11$

The average weight of $15$ oarsmen in a boat is increased by $1.6$ kg when one of the crew, who weighs $42$ kg is replaced by a new man. Find the weight of the new man (in kg).

A student was asked to find the arithmetic mean of the following $12$ numbers: $3$, $11$, $7$, $9$, $15$, $13$, $8$, $19$, $17$, $21$, $14$ and x. He found the mean to be $12.$ The value of x will be:

A librarian purchased $50$ story-books for his library. But he saw that he could get $14$ more books by spending Rs. $76$ more and the average price per book would be reduced by Re. $1.$ The average price (in Rs.) of each book he bought, was :

Six friends have an average height of $167$ cms. A boy with height $162$ cm leaves the group. Find the new average height.

The arithmetic mean of the following numbers $1$, $2$, $2$, $3$, $3$, $3$, $4$, $4$, $4$, $5$, $5$, $5$, $5$, $6$, $6$, $6$, $6$, $6$, $6$, and $7$, $7$, $7$, $7$, $7$, $7$, $7$ is

A library has an average number of $510$ visitors on Sunday and $240$ on other days. The average number of visitors per day in a month of $30$ days beginning with Sunday is :

The mean high temperature of the first four days of a week is $25$°C whereas the mean of the last four days is $25.5$°C. If the mean temperature of the whole week is $25.2$°C then the temperature on the 4th day is

The average marks of $32$ boys of section A of class X is $60$ whereas the average marks of $40$ boys of section B of class X is $33.$ The average marks for both the sections combined together is

The mean of $9$ observations is $16.$ One more observation is included and the new mean becomes $17.$ The 10th observation is

The average marks of $50$ students in a class is $72.$ The average marks of boys and girls in that subject are $70$ and $75$ respectively. The number of boys in the class is

The average marks obtained by a class of $60$ students is $65.$ The average marks of half of the students is found to be $85.$ The average marks of the remaining students is

The average of n numbers $x1$, $x2$, .... xn is x̄. Then the value of sum_{i=1}^{n} (xi - x̄) is equal to

The average of some natural numbers is $15.$ If $30$ is added to first number and $5$ is subtracted from the last number the average becomes $17.5$ then the number of natural number is

Out of $20$ boys, $6$ are each of $1$ m $15$ cm height, $8$ are of $1$ m $10$ cm and rest are of $1$ m $12$ cm. The average height of all of them is

The average of $8$ numbers is $27.$ If each of the numbers is multiplied by $8$, find the average of new set of numbers.

Six tables and twelve chairs were bought for Rs $7$,$800.$ If the average price of a table is Rs $750$, then the average price of a chair would be

The average of $100$ numbers is $44.$ The average of these $100$ numbers and $4$ other new numbers is $50.$ The average of the four new numbers will be

The average monthly salary of all the employees in an industry is Rs $12$,$000.$ The average salary of male employees is Rs $15$,$000$ and that of female employees is Rs $8$,$000.$ What is the ratio of male employees to female employees?

If the average marks of three batches of $55$, $60$ and $45$ students respectively is $50$, $55$ and $60$, then the average marks of all the students is

Three Science classes A, B and C take a Life Science test. The average score of class A is $83.$ The average score of class B is $76.$ The average score of class C is $85.$ The average score of class A and B is $79$ and average score of class B and C is $81.$ Then the average score of classes A, B and C is

The average weight of A, B and C is $45$ kg. If the average weight of A and B be $40$ kg and that of B and C be $43$ kg, then the weight of B is :

If the average weight of $6$ students is $50$ kg; that of $2$ students is $51$ kg; and that of other $2$ students is $55$ kg; then the average weight of all students is

The average of x numbers is y and average of y numbers is x. Then the average of all the numbers taken together is

The average of $30$ results is $20$ and the average of other $20$ results is $30.$ What is the average of all the results?

The average weight of first $11$ persons among $12$ persons is $95$ kg. The weight of 12th person is $33$ kg more than the average weight of all the $12$ persons. The weight of the 12th person is

The average of $30$ numbers is $15.$ The average of the first $18$ numbers is $10$ and that of the next $11$ numbers is $20.$ The last number is

There are $100$ students in $3$ sections A, B and C of a class. The average marks of all the $3$ sections was $84.$ The average of B and C was $87.5$ and the average marks of A was $70.$ The number of students in A was

The average of marks obtained by $100$ candidates in a certain examination is $30.$ If the average marks of passed candidates is $35$ and that of the failed candidates is $10$, what is the number of candidates who passed the examination?

The average income of $40$ persons is Rs. $4200$ and that of another $35$ persons is Rs. $4000.$ The average income of the whole group is:

$4$ boys and $3$ girls spent Rs $120$ on the average, of which boys spent Rs $150$ on the average. Then the average amount spent by the girls is

The average of $1$, $3$, $5$, $7$, $9$, $11$, ........ to $25$ terms is