Two balanced dice are rolled simultaneously. Then,the probability that the sum of numbers on the dice is $13$ is ..............

There are boards numbered $1$ to $50$ in a box. One board is selected at random. Find the probability that the number on the board is a multiple of $10$. (in $/10$)

If $P(\overline{D}) = \frac{6}{17}$,then $P(D) = \ldots$

There are $5$ white,$7$ red,$4$ black and $2$ blue identical balls in a box. One ball is selected at random from the box. Find the probability that the selected ball is either red or black. (in $/18$)

Two balanced dice are rolled simultaneously. Then,the probability that the same number appears on both the dice is ..........

There are $5$ red,$8$ white,and $4$ green balls in a box. $A$ ball is drawn at random from the box. Find the probability that the ball drawn is not green.