For two events A and B, it is given that $$P(A) = {3 \over {5}}$$ $$P(B) = {3 \over {10}}$$ and $$P(A/B) = {2 \over 3}$$. If $$\overline A $$ and $$\overline B $$ are the complementary events of A and B, then what is $$P(\overline A /\overline B )$$ equal to ?

A machine had three parts, A, B and C, whose chances of being defective are 0.02, 0.10 and 0.05 respectively. The machine stops working if any one of the parts becomes defective. What is the probability that the machine will not stop working?

Three independent events, A₁, A₂ and A₃ occur with probabilities $$P({A_i}) = {1 \over {1 + i}}$$, i = 1, 2, 3. What is the probability that at least one of the three events occurs?

A coin is tossed three times. Consider the following events.

A : No head appears.

B : Exactly one head appears.

C : At least two heads appear.

Which one of the following is correct?