In a throw of a die, what is the probability of getting a number less than $7$
$0$
$1$
$\frac{1}{2}$
None of these
(b) It is obvious.
Three coins are tossed. Describe Three events which are mutually exclusive but not exhaustive.
An unbiased die is tossed until a number greater than $4$ appears. The probability that an even number of tosses is needed is
A set $S$ contains $7$ elements. A non-empty subset $A$ of $S$ and an element $x$ of $S$ are chosen at random. Then the probability that $x \in A$ is
For any event $A$
Three fair coins are tossed. If both heads and tails appears, then the probability that exactly one head appears, is
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