Two dice are rolled simultaneously. The probability that the sum of the two numbers on the dice is a prime number is:

The probability of drawing a white ball from a bag containing $3$ black balls and $4$ white balls is:

Two dice are thrown simultaneously. The probability of obtaining a total score of $5$ is

If two dice are thrown simultaneously,then the probability that the sum of the numbers which come up on the dice is more than $5$ is:

Two students,Anil and Ashima,appeared in an examination. The probability that Anil will qualify the examination is $0.05$ and that Ashima will qualify the examination is $0.10$. The probability that both will qualify the examination is $0.02$. Find the probability that only one of them will qualify the examination.

The probability of at least one of the events $A$ and $B$ occurring is $0.6$. If the probability of both $A$ and $B$ occurring simultaneously is $0.3$,then $P(A') + P(B') = \dots$