The average weight of 21 boys was recorded as 64 kg. If the weight of the teacher was added, the average increased by 1 …

The mean of 25 observations was found to be 78.4. But later on it was found that 96 were misread as 69. The correct mean…

The average of the ages of Sumit, Krishna and Rishabh is 43 and the average of the ages of Sumit, Rishabh and Rohit is 4…

The average monthly income of P and Q is Rs. 6000; that of Q and R is Rs. 5250; and that P and R is Rs. 5500. What is P&…

The average monthly income of A and B is Rs. 14000, that of B and C is Rs. 15600 and A and C is Rs. 14400. The monthly i…

Find the average of first 97 natural numbers.

The average age of a cricket team of 11 players is the same as it was 3 years back because 3 of the players whose curren…

If the mean of 5 observations x, x + 2, x + 4, x + 6 and x + 8 is 11, then the mean of the last three observations is-