The probability that a student will score centum in mathematics is . The probability that he will not score centum is

If p is the probability of an event A, then p satisfies

Let A and B be any two events and S be the corresponding sample space.

Then =

If A and B are two events such that

P (A) = 0.25, P (B) = 0.05 and P(A ∩ B) = 0.14, then P(A ∪ B) =

There are 6 defective items in a sample of 20 items. One item is drawn at random. The probability that it is a non-defective item is