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The present average age of X, Y, and Z is 45 years. 8 years ago, the average age of X and Y was 38 years. What is the present age of Z?
The average cost price of 15 pens (having equal cost price) decreased by Rs.2, when one of the pen is replaced by a new pen having cost price of Rs.70. ...
The average age of a group of 20 students is 40 years. Two persons of age 35 years and 30 years, left the group and 2 persons of age 40 years and 85 yea...
The average cost of 3 chairs is Rs. 8000. The average cost decrease by 20% when one more chair is included. What is the cost price of the 4th...
The average of five even numbers is 64. If we replace two of these even numbers, 84 and 92, with a single even number X, the new average decreases by 4....
Average weight of a team of 10 persons is 30 kg. When one more person joins the team, the average weight of the team increases by 3 kg. Find the weight ...
Average age of company A is 22 years and average age of both companies A and B is 14 years. If the ratio of number of employees in company A and B is 3:...
The cost of booking a bus consists of a fixed charge and a variable charge per seat. When 75 seats are booked, the average cost per seat is Rs. 36. Howe...
In a factory, the average salary of all employees is Rs. 5600 and the average salary of 24 supervisor is 7200. If the average salary of labours is 4800,...
In the Board exams, the average marks scored by 20 students is 55. But while calculating, marks of 2 students were wrongly entered as 43 and 60 in place...
