If two dice are thrown simultaneously then probability that $1$ comes on first dice is
$\frac{1}{{36}}$
$\frac{5}{{36}}$
$\frac{1}{6}$
None of these
An unbiased die is tossed until a number greater than $4$ appears. The probability that an even number of tosses is needed is
The probability of happening an event $A$ in one trial is $0.4$. The probability that the event $A$ happens at least once in three independent trials is
$A$ and $B$ are two independent events such that $P(A) = \frac{1}{2}$ and $P(B) = \frac{1}{3}$. Then $P$ (neither $A$ nor $B$) is equal to
Three fair coins are tossed. If both heads and tails appears, then the probability that exactly one head appears, is
Three dice are thrown simultaneously. What is the probability of obtaining a total of $17$ or $18$