Rina and shila entered into a partnersship with their capitals in the ratio 5 : 6. At the end of 8 months, Rina withdraws her capital. If they receive the profit in the ratio of 5 : 9, find how long shila's capital was used?

Three coins are tossed. Find the probability of at least one head and one tail.

Three time the present age of a father is equal to eight times the present age of his son. Eight years hence t...

If x>y>0 and p>q>0, then which one of the following expressions must be greater than 1?

The ratio of girls to boys in a class is 3:4. The number of students in the class could be any of the followin...

If (4x-7)

Two third of the faculty members of a department are female. Twelve of the male faculty members are unmarried,...