A pack of cards contains $4$ aces, $4$ kings, $4$ queens and $4$ jacks. Two cards are drawn at random. The probability that at least one of these is an ace, is
$\frac{9}{{20}}$
$\frac{3}{{16}}$
$\frac{1}{6}$
$\frac{1}{9}$
A fair dice is thrown up to $20$ times. The probability that on the $10^{th}$ throw, the fourth six apears is :-
An unbiased coin is tossed eight times. The probability of obtaining at least one head and at least one tail is
Three cards are drawn at random from a pack of $52$ cards. What is the chance of drawing three aces
An ordinary cube has four blank faces, one face marked $2$ another marked $3$. Then the probability of obtaining a total of exactly $12$ in $5$ throws, is
A bag contains $5$ distinct Red, $4$ distinct Green and $3$ distinct Black balls. Balls are drawn one by one without replacement,then the probability of getting a particular red ball in fourth draw is-