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…

The average age of an adult class is 40 years. 12 new students with an average age of 32 years join the class, thereby d…

A pupil's marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by h…

The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?

The average of 9 observations was found to be 35. Later on, it was detected that an observation 81 was misread as 18. Th…

The monthly incomes of five persons are Rs. 1132, Rs. 1140, Rs. 1144, Rs. 1136 and Rs. 1148 respectively. What is their…

The average of the first 100 positive integers is -

Out of three numbers, the first is twice the second and is half of the third. If the average of the three numbers is 56,…