There are 50 boys in a class whose average age is 12 years. There are 40 boys inanother class whose average age is 15 years. The average age of both the classes
taken together is:
The difference of two numbers is 26 and one number is thrice the other, one of thenumber is:
1/x-1/y=1/z, then z is equal to:
If the circumference and the area of a circle are numerically equal then the numeri-cal value of the diameter is:
If p = 8, q = 3 and r = -2, then the value of 2pq−7qr/pq+4pr is:
A merchant sold a radio of cost Rs. 70 at the price of Rs. 98. The profit is:
