Two dice are thrown. The events $A, B$ and $C$ are as follows:
$A:$ getting an even number on the first die.
$B:$ getting an odd number on the first die.
$C:$ getting the sum of the numbers on the dice $\leq 5$
Describe the events $A^{\prime }.$
Three coins are tossed once. Find the probability of getting exactly $2$ tails.
A number is chosen from first $100$ natural numbers. The probability that the number is even or divisible by $5$, is
From a pack of $52$ cards one card is drawn at random, the probability that it is either a king or a queen is
The probability of happening of an impossible event i.e. $P\,(\phi )$ is