Averages Questions

The average weight of a group of 15 students is 70 kg. Five more students of weight 65 kg, 68 kg, 45 kg, 77 kg and 62 kg join the group. What is the change in the average weight (rounded off to the nearest integer) of the group?

The average of six numbers is 4. The average of two of them is 3.5, while the average of the other two is 3.75. What is the average of the remaining two numbers?

Rahul's average score across three exams is $82$. In his fourth exam, he scores $94$. What is Rahul's new average score across all four exams?

The given bar graph shows the total number of different types of electronic devices P, Q, R, S, T (in lakh) imported by the government of India in 2017 and 2018. Study the graph carefully and answer the following question.The average import of P and R types of electronic devices in 2018 was equal to the import of which type in 2017?

A fruit seller has 10kg of apples and 5kg of grapes. The price of 1kg of apples is ₹94.50 and that of grapes is ₹105. He sold all the fruits with him. What is the average amount (in ₹) received by the fruit seller per kg?

The average age of 66
3
2
​
% of the number of children in a group is 13 years. The average age of all the children in the group is 14.5 years. What is the average age (in years) of the remaining children?

The average age of 26 students in a class is 15 years. If teacher's age is included in it, then the average will increase by one. What is the teacher's age (in years)?

The average of 50 numbers is 36. If two numbers, namely 63 and 65 are discarded, the average of the remaining numbers is (Correct to two decimal places):

The average age of the Indian cricket team playing in the Capetown test match is 28 years. If the average age of 10 players except the Captain is 27.8 years, then the age of the Captain is:

The average of 12 numbers is 47. The average of the first 5 numbers is 45 and the average of the next 4 numbers is 52. If the 10
th
number is 10 less than the 11
th
number and is 5 more than the 12
th
number, then what is the average value of the 11
th
and 12
th
numbers?

The average of v numbers is w
2
and that of w numbers is v
2
. Then the average of all the numbers is:

The average age of all the students of a class is 18 years. The average age of the boys of the class is 19 years and of the girls is 14 years. If the number of girls in the class is 30, then what is the number of boys in the class?

The university has 750 faculty (male and female only) out of which the females are 60%. The average height of females is 162cm and that of males is 168cm. What is the average height of the faculty (in cm) of the university?

The average per day income of $A$, $B$ and $C$ is $\text{Rs. }45$. If the average per day income of $A$ and $B$ is $\text{Rs. }40$ and that of $B$ and $C$ is $\text{Rs. }43$, then the per day income of $B$ is:

If the weight of A is 40 kg, weight of B is 54 kg and weight of C is 62 kg, then what is the average weight (in kg) of the three persons?

The average money P and his seven friends have is ₹$450$. If P has ₹$120 more than the average money of his seven friends, how much money (in ₹) does P have?

The average age of $29$ students of a class and their teacher is $14\text{ years}$. When the teacher's age is excluded, the average age of the students decreases by $1\text{ year}$. What is the age (in years) of the teacher?

In a class of $80$ students, $40\%$ are boys and the rest are girls. The average score in mathematics of all the students is $72$. If the average score of the girls is $66$, then what is the average score of the boys?

A man's pension on retirement from service is equal to half the average salary during the last $3$ years of his service. His salary from 1-1-1983 is $\text{₹}380$ per month, with increment of $\text{₹}40$ due on 1-10-1983, 1-10-1984 and 1-10-1985. If he retires on 1-1-1986, what pension does he draw per month?

The batting average for $30$ innings of a cricket player is $40$ runs. His highest score exceeds his lowest score by $100$ runs. If these two innings are not included, the average of the remaining $28$ innings is $38$ runs. Then the lowest score of the player is:

The average salary of male employees in a firm was $\text{Rs. }52$ and that of female employees was $\text{Rs. }42$. If the mean salary of all the employees was $\text{Rs. }50$, what was the percentage of female employees?

The average of $9$ numbers is $30$. The average of the first $5$ numbers is $25$ and that of the last $3$ numbers is $35$. What is the $6^{\text{th}}$ number?

The average monthly income of $A$ and $B$ is $\text{Rs. }1400$, that of $B$ and $C$ is $\text{Rs. }1560$ and of $A$ and $C$ is $\text{Rs. }1440$. The monthly income of $C$ is:

Kartik walks from point $A$ to $B$ with $50\text{ km/hr}$ speed and returns $B$ to $A$ with speed of $30\text{ km/hr}$. Find his average speed.

The average marks of $28$ students in Mathematics was $5$. When $8$ students left the school, the average increased by $0.5$. What is the average of marks obtained by the students who left the school?