Two dice are thrown. The probability that the sum of the points on two dice will be $7$ is:

From a pack of $52$ cards,one card is drawn at random. The probability that it is either a king or a queen is:

The chances of throwing a total of $3$ or $5$ or $11$ with two dice is

$A$ drawer contains $50$ bolts and $150$ nuts. Half of the bolts and half of the nuts are rusted. If $1$ item is chosen at random,what is the probability that it is rusted or is a bolt?

$3$ coins are tossed. Find the probability of getting at least $1$ head and $1$ tail.

$A$ 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