In a group of 7 students, 4 boys and 3 girls spent an average of ₹150 each. If the average spending of the boys was ₹180, what was the average spending of the girls ?
A company had 5 departments with an average of 50 employees each. Later, a sixth department was added with 80 employees. Due to restructuring, 20 employees from each of the original five departments were transferred to the new department. What is the new average number of employees per department?
In a hostel, the average age of 40 students was 20 years. Later, 10 students left and 10 new students joined. The average age of the new group became 18.2 years. If the average age of the 10 students who left was 22.4 years, find the average age of the 10 students who joined.
In a class of a certain number of students, if a student weighing 60 kg joins, the average weight increases by 2 kg . If another student weighing 60 kg joins, the average increases by 3.5 kg over the original average. What was the original average weight of the class?
The average marks of 20 students in a mathematics test were 55. Later, it was discovered that one student's marks were wrongly recorded as 40 instead of 70. After correction, the average increases. A new student then joins the group whose marks are 20% more than the corrected average. What is the final average of the group?
A bike travels from town P to town at an average speed of and returns from town Q to town P at an average speed of . What is the average speed for the entire trip ?
A school had 105 students with an average age of 30 years. Later, a new batch of students joined. After their inclusion, the average age dropped to 29.5 years, even though the newcomers had an average age of 28 years. Find the number of students in the new batch.
The average age of 12 players of a cricket team is the same as it was 3 years ago because 4 players, whose current average age is 30 years, have been replaced by 4 new players. What is the average age of new players ?
In a digital learning centre, there are three types of online tests. The average score of a student in the first and second test is 84 . The average score in the second and third test is 82 . The average of the first and third test is 80 . If the student scored 4 marks less in the third test than in the first, find the marks obtained in the second test.
There are 11 numbers. The average of all 11 is 50 . The average of the first 6 numbers is 48 . The average of the last 6 numbers is 55 . What is the 6th number?
The average age of 22 students is 16 years. If the teacher's age is included, the average rises by 2 year. Later, another teacher joins, and the average rises by 3 more years. What is the age of the second teacher?
The average of four numbers is 30 . The average of the first and second is 25 , and that of the third and fourth is 35 . What is the second number if the first is 20?
At an organization, 4 events were organized. The average attendance for the first two events was 168.5 people. The next two events had an average of 182.5 people. Later, due to a correction, it was found that the attendance at one of the first two events was 15 more than what was originally recorded, and one of the last two events was 7 less. Find the corrected overall average attendance for all 4 events.
The average age of class of 10 students is 30 years. The average age of class B of 20 students is ' ' years. The combined average age of class A and class B is 44years. What is the value of 'x'?
Which of the following statements is/are INCORRECT ?
I. The average of 8 numbers is 25 . If one number is removed, the average of the remaining 7 numbers becomes 24 , then the removed number is 32 .
II. If instead, the removed number was 18 , the average of the remaining 7 numbers would be 26 .
The average age of 25 students is 16 years. A group of 5 new students joins, increasing the average to 18 years. Find the average age of the 5 new students.
The average of 13 numbers is 51 . If the first seven numbers have an average of 50 and the last seven numbers have an average of 51 , find the middle number.
