If the probabilities of a boy and a girl being born are the same,then in a $4$-children family,the probability of having at least one girl is:

If $A$ and $B$ throw two dice $100$ times each simultaneously,then the probability that both of them will get an even number as the total score at the same time in all the throws is

In a Binomial distribution consisting of $5$ independent trials,probabilities of exactly $1$ and $2$ successes are $0.4096$ and $0.2048$ respectively,then the probability of getting exactly $4$ successes is

If a dice is thrown $7$ times,then the probability of obtaining $5$ exactly $4$ times is

Mean and variance of a binomial probability distribution are $4$ and $\frac{4}{3}$ respectively. Then the probability of at least two successes is equal to:

In a tournament,a team plays $10$ matches with probabilities of winning and losing each match as $\frac{1}{3}$ and $\frac{2}{3}$ respectively. Let $x$ be the number of matches that the team wins,and $y$ be the number of matches that the team loses. If the probability $P(|x-y| \leq 2)$ is $p$,then $3^9 p$ equals....................