Which of the following statements are correct? (A) If E and F are independent events then $P(E∩F) = P(E) P(F)$ Choose the correct answer from the options given below: |
(A) and (C) only (A), (B) and (C) only (B) and (D) only (C) and (D) only |
(A) and (C) only |
The correct answer is Option (1) → (A) and (C) only (A) If $E$ and $F$ are independent events then $P(E\cap F)=P(E)P(F)$ This is the definition of independence. True (B) If $E$ and $F$ are mutually exclusive events, then $P(E\cup F)=P(E)+P(F)-P(E)P(F)$ For mutually exclusive events $P(E\cap F)=0$, so $P(E\cup F)=P(E)+P(F)$ Hence this statement is false. False (C) The conditional probability of $E$ given $F$ is $\frac{P(E\cap F)}{P(F)},\;P(F)\ne0$ This is the definition of conditional probability. True (D) $P(\bar E|F)=2-P(E|F)$ But $P(\bar E|F)=1-P(E|F)$ Hence false. The correct statements are (A) and (C). |