JEE Previous Year Question
and each select one number at random from the distinct numbers and the probability that the number selected by is less than the number selected by is . Now, the probability that the number selected by is the number immediately next to the number selected by is
Topic: JEE PYQ
Answer: B. Full step-by-step solution below.
- A
- B
- C
- D
Correct answer: B
Solution
(b) Since, and each select one number randomly from the distinct numbers , then the probablity that the number selected by is less than the number selected by isNow, number of ways selecting numbers from the distinct numbers , by is the number immediately next ot the number selected by is 2018 , because there are 2018 pairs of consecutive numbers.
So, required probability
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