The probability of getting at least one tail in $4$ throws of a coin is
$\frac{{15}}{{16}}$
$\frac{1}{{16}}$
$\frac{1}{4}$
None of these
The probability that a leap year will have $53$ Fridays or $53$ Saturdays is
The probability of $A, B, C$ solving a problem are $\frac{1}{3},\,\frac{2}{7},\,\frac{3}{8}$ respectively. If all the three try to solve the problem simultaneously, the probability that exactly one of them will solve it, is
Describe the sample space for the indicated experiment: A coin is tossed four times.
On her vacations Veena visits four cities $(A,\,B ,\, C$ and $D$ ) in a random order. What is the probability that she visits $A$ either first or second?
Three coins are tossed. Describe Two events which are mutually exclusive but not exhaustive.