A box contains $2$ black, $4$ white and $3$ red balls. One ball is drawn at random from the box and kept aside. From the remaining balls in the box, another ball is drawn at random and kept aside the first. This process is repeated till all the balls are drawn from the box. The probability that the balls drawn are in the sequence of $2$ black, $4$ white and $3$ red is
$\frac{1}{{1260}}$
$\frac{1}{{7560}}$
$\frac{1}{{126}}$
None of these
From a well shuffled pack of cards one card is drawn at random. The probability that the card drawn is an ace is
Three coins are tossed once. Find the probability of getting atmost two tails.
A man and a woman appear in an interview for two vacancies in the same post. The probability of man's selection is $1/4$ and that of the woman's selection is $1/3$. What is the probability that none of them will be selected
Three coins are tossed once. Find the probability of getting exactly $2$ tails.
The chance of getting a doublet with $2$ dice is