Five horses are in a race. $Mr. \,A$ selects two of the horses at random and bets on them. The probability that $Mr.\, A$ selected the winning horse is
$\frac{4}{5}$
$\frac{3}{5}$
$\frac{1}{5}$
$\frac{2}{5}$
There are two childrens in a family. The probability that both of them are boys is
If $A$ and $B$ are two independent events such that $P\,(A \cap B') = \frac{3}{{25}}$ and $P\,(A' \cap B) = \frac{8}{{25}},$ then $P(A) = $
Three coins are tossed once. Find the probability of getting $2$ heads
A box contains $1$ red and $3$ identical white balls. Two balls are drawn at random in succession without replacement. Write the sample space for this experiment.
From a pack of $52$ cards one card is drawn at random, the probability that it is either a king or a queen is