For a random experiment to be classified as a Bernoulli’s trial, the following conditions must be satisfied: - There must be a finite number of trials. Hence, (A) is correct. - The trials must be independent. Therefore, (B) is incorrect. - Each trial should have exactly two possible outcomes: success or failure.
Therefore, (C) is incorrect. - The probability of success should remain constant for each trial. Hence, (D) is correct.
Thus, only (A) and (D) are true for Bernoulli’s trials.
Three friends, P, Q, and R, are solving a puzzle with statements:
(i) If P is a knight, Q is a knave.
(ii) If Q is a knight, R is a spy.
(iii) If R is a knight, P is a knave. Knights always tell the truth, knaves always lie, and spies sometimes tell the truth. If each friend is either a knight, knave, or spy, who is the knight?