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The average age of a group of 10 friends is 27 years. If one friend leaves the group, the average becomes 25years. Find the age of the friend who left t...
The average age of A and B is 21 years. If A is to be replaced by C, the average would be 20 years. The average age of C and A is 22 years. Find the age...
The average salary of a group of 12 employees is Rs. 60,000. When one employee departs, the average salary of the remaining 11 employees drops by Rs. 2,...
The average weight of 4 persons is 66 kg. The heaviest person’s weight is 32 kg more than the lightest person’s weight. If the average weight of the...
Each side of a rhombus is 20cm long and the length of one of its diagonals is 24cm, then find the area of the rhombus.
The average mark obtained by 120 candidates in a certain examination is 50. If the average marks of passed candidates are 55 and that of the failed cand...
The average expenditure of a man for the first 4 month is Rs.5000 and for the next 8 months is Rs.8000. If he saves 12000 in that year then find his ave...
The average weight of a group of NN children is (N+1)(N + 1) kg. When a child weighing 36.5 kg leaves the group, the average weight decreases by 0.5 kg....
The average expenditure of a man for the first 4 month is Rs.4000 and for the next 8 months is Rs.6000. If he saves 11000 in that year then find his ave...
