If the letters of the word $SUCCESS$ are rearranged,what is the probability that all identical letters come together (in $/35$)?

If four vertices of a regular octagon are chosen at random,then the probability that the quadrilateral formed by them is a rectangle is

If $A_1, A_2, \ldots, A_{15}$ are the events of a random experiment, then which one of the following is true?

An urn contains $9$ balls of which $3$ are red,$4$ are blue and $2$ are green. Three balls are drawn at random from the urn. The probability that the three balls have different colours is

$A$ poker hand consists of $5$ cards drawn at random from a well-shuffled pack of $52$ cards. The probability that a poker hand consists of a pair and a triple of equal face values (for example, $2$ sevens and $3$ kings or $2$ aces and $3$ queens, etc.) is:

$A$ 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 until 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