Word ‘$UNIVERSITY$’ is arranged randomly. Then the probability that both ‘$I$’ does not come together, is
$\frac{3}{5}$
$\frac{2}{5}$
$\frac{4}{5}$
$\frac{1}{5}$
A bag contains $6$ red, $5$ white and $4$ black balls. Two balls are drawn. The probability that none of them is red, is
There are $n$ letters and $n$ addressed envelops. The probability that each letter takes place in right envelop is
A bag contains $3$ white and $5$ black balls. If one ball is drawn, then the probability that it is black, is
Out of $100$ students, two sections of $40$ and $60$ are formed. If you and your friend are among the $100$ students, what is the probability that you both enter the same section ?
Two numbers are selected randomly from the set $S = \{ 1,\,2,\,3,\,4,\,5,\,6\} $ without replacement one by one. The probability that minimum of the two numbers is less than $4$ is