After replacing an old member by a new member, it was found that the average age of five members of a club is the same a…

Five years ago, the average age of A, B, C and D was 45 yr. with E joining them now, the average of all the five is 49 y…

Six tables and twelve chairs were bought for Rs. 7800. If the average price of a table is Rs. 750, then the average pric…

The average age of 9 students and their teacher is 16 years. The average age of the first four students is 19 years and…

The average weight of 45 students in a class is 52 kg. Five of them whose average weight is 48 kg leave the class and ot…

The average of the reciprocals of x and y is-

The average of the two-digit numbers, which remain the same when the digits interchange their positions, is-

The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was…