If in a lottary there are $5$ prizes and $20$ blanks, then the probability of getting a prize is
$\frac{1}{5}$
$\frac{2}{5}$
$\frac{4}{5}$
None of these
From the word `$POSSESSIVE$', a letter is chosen at random. The probability of it to be $S$ is
Two dice are thrown and the sum of the numbers which come up on the dice is noted. Let us consider the following events associated with this experiment
$A:$ $^{\prime}$ the sum is even $^{\prime}$.
$B:$ $^{\prime}$the sum is a multiple of $3$$^{\prime}$
$C:$ $^{\prime}$the sum is less than $4 $$^{\prime}$
$D:$ $^{\prime}$the sum is greater than $11$$^{\prime}$.
Which pairs of these events are mutually exclusive ?
Consider the experiment of rolling a die. Let $A$ be the event 'getting a prime number ', $B$ be the event 'getting an odd number '. Write the sets representing the events $^{\prime}$ not $A\,^{\prime}$.
A card is drawn from a well shuffled pack of cards. The probability of getting a queen of club or king of heart is
Consider the experiment of rolling a die. Let $A$ be the event 'getting a prime number ', $B$ be the event 'getting an odd number '. Write the sets representing the events $A$ but not $B$