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...
- The average of five numbers is 62. When three more numbers are included, the average increases by 6. Find the average of the numbers included.
- In a sports club, the ratio of the number of footballs, basketballs, and volleyballs is 3:2:4, respectively, and the average number of these items is 72. W...
The average age of A and B is 18 years. If A is to be replaced by C, the average would be 17 years. The average age of C and A is 19 years. Find the age...
Determine the value of a − b given that a + 3b = 18a and 3a + b = 30 .
The average number of books on history, polity and geography in a library is 165, and the average number of books on history and geography is 140. If th...
The average weight of 30 students in a class increases by 0.5 kg when the weight of the principal is included. If earlier the average weight of the stud...
18 years ago the average age of a family of four members was 45 years. Two children were born in that span of 18 years. The present average age of the ...
- The average of ‘x’ numbers is 25. If 70% of the numbers are decreased by 3 and the remaining numbers are increased by 9, then find the new average of t...
Rs. 5040 was distributed among W, X, Y, and Z in the ratio 2:5:4:3 respectively. After that, X gave an amount equal to 80% of the average of W and Z's i...
