Three identical dice are rolled. The probability that the same number will appear on each of them is:

$A$ man is known to speak the truth $3$ out of $4$ times. He throws a die and reports that it is a six. The probability that it is actually a six,is

If two dice are thrown simultaneously,then the probability that $1$ comes on the first die is:

$A$ bag contains $4$ white balls and $2$ black balls. Another bag contains $3$ white balls and $5$ black balls. If one ball is drawn from each bag,then the probability that both the balls are black,is

The probability of an impossible event,i.e.,$P(\phi)$,is:

An $URN$ contains $6$ blue,$4$ red,$3$ green and $2$ yellow marbles. If two marbles are picked at random,what is the probability that either both are yellow or both are green?