GATE 2022 IN – Question 32
A bag contains six red balls and four blue balls. If three balls are drawn in succession without replacement, the probability that the second and third balls drawn are red is ________ (round off to two decimal places)
Practise this question in The GATE Grind →
Show answer and explanation
Correct answer: 0.32 to 0.34
Explanation
Exchangeability makes any two fixed positions equivalent to the first two. Probability is (6/10)(5/9)=1/3, regardless of the first draw’s color. Rounded to two decimals, **0.33**.