The ratio of number of girls to number of boys is 3: 2 in a class of 70 students. The average marks scored by the boys in Physics is 72 and the average...
The average temperature of Monday, Tuesday, Wednesday and Thursday is 50°. The average temperature for Tuesday, Wednesday, Thursday and Friday is 60°....
The average age of A and B is 17 years. If A is to be replaced by C, the average would be 16 years. The average age of C and A is 18 years. Find the age...
The average weight of 12 persons increases by 3.5 kg when a new person comes in place of one of them weighing 58 kg. The weight of the new person is
The average of 8 numbers is 22. When two new numbers 'p' and 'q' are added, the average increases by 3. If p - q = 10, find the value of q.
The average of five positive numbers is 56. If the first number is three-fourth of the sum of the last four numbers, then the average of the last four n...
Average run scored by a batsman in first ‘x’ matches is 20. In next 5 matches he scored runs with an average of 60 so that his overall average incre...
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 number of sweets distributed in a class of 25 students is 6. If ‘x’ number of students newly joined the class and the average becomes 5,...
The average age of a group of nine children is 7 years. From the group, three children, whose ages were 3 years more, 2 years more, and 4 years more tha...
