JEE Main 2024 Mathematics question
A coin is biased so that a head is twice as likely to occur as a tail. If the coin is tossed 3 times then the probability of getting two tails and one head is
Answer: (A)
Solution
P(H) = 2/3 and P(T) = 1/3. The probability of two tails and one head in three tosses = 3 × (2/3)(1/3)² = 2/9.