MATHEMATICS · Multi-part · CBSE · Mathematics · Probability · Probability
Problem
(Complementary events in coin tossing)
(i) Define a complementary event and write the relationship between the probabilities of an event and its complement.
(ii) A fair coin is tossed five times. Find the probability that at least one tail appears in the five tosses.
(iii) Give one reason why the method you used in part (ii) is more convenient than listing all favourable cases directly.