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…

If the average of 6 consecutive even number is 25, the difference between the largest and the smallest number is :

Which one of the following numbers can be removed from the set S = {0, 2, 4, 5, 9} without changing the average of set S…

The average of X<sub>1</sub>, X<sub>2</sub> and X<sub>3</sub> is 14. Twice the sum o…

The average salary, per head, of all the workers of an institution is Rs. 60. The average salary of 12 officers is Rs. 4…

Out of 10 teachers of a school, one teacher retires and in place of him a new teacher 25 years old joins. As a result of…

The average age of four boys A, B, C and D is 5 years and the average age A, B, D, E is 6 years. C is 8 years old. The a…

The average monthly income of P and Q is Rs. 5050. The average monthly income of Q and R is Rs. 6250 and the average mon…