If A and B are two events write the expression for the probability of occurrence of exactly one of two events.

If A and B are two independent events such that P(A) = 0.3 and . Find P(B).

An unbiased die with face marked 1, 2, 3, 4, 5, 6 is rolled four times. Out of 4 face values obtained, find the probability that the minimum face value is not less than 2 and the maximum face value is not greater than 5.

Write the probability that a number selected at random from the set of first 100 natural numbers is a cube.

In a competition A, B and C are participating. The probability that A wins is twice that of B, the probability that B wins is twice that of C . Find the probability that A losses.