Average of 15 observations calculated by a student was 70 but when he again went through his observations he realised that he took value of three observ...
The average cost of 4 chairs is Rs. 11000. The average cost decrease by 15% when one more chair is included. What is the cost price of the 5th
There are 15 natural numbers whose average is 30.6. The average of the first 8 numbers is 28, and the average of the last 8 numbers is 33. Find the eigh...
A team consists of a certain number of members. If 4 people with an average weight of 65 kg leave the team, the average weight of the remaining members ...
A class of 45 students has a total weight of 1080 kg. Two students with weights 22 kg and ‘z’ kg leave the class, and a new student with weight (3z ...
A student got an average score of certain marks in the first 16 tests. In the next 4 tests, she scored 76 marks on average. This raised her overall aver...
The number of students in class 'A' is 90, and the ratio of girls to boys is 3:2. If the average number of boys in classes A and B is 120, and the avera...
The average expenditure of a man for the first 7 month is Rs.5000 and for the next 5 months is Rs.8000. If he saves 12000 in that year then find his ave...
The average weight of 4 persons is 40 kg. The heaviest person’s weight is 26 kg more than the lightest person’s weight. If the average weight of the...
The average age of a class of 25 girls is 16 years. If 5 new girls having average age of 10 years join the class, then the average age of the class beco...
