If two fair coins are flipped, what is the probability that one will come up heads and the other tails?

At the beginning of a class period, half of the students in a class go to the library. Later in the period, ha...

The number of different signals which can be given form 6 flags of different colours taken one or more at a ti...

The number of parallelograms that can be formed from a set of four parallel lines intersecting another set of...

Bus fare recently was increased form Taka 0.85 to Taka 1.00 what was the approximate percentage of increase?

The next number in the sequence , 3, 6 m 11, 18, 27, .... is

By how much is the value of { -10 - (-7) } greater than the value of { -10 + (-7) } ?