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Question: Answered & Verified by Expert
A random variable X has the following probability distribution:
X:12345PX: k22kk2k5k2
Then, PX>2 is equal to:
MathematicsProbabilityJEE MainJEE Main 2020 (09 Jan Shift 2)
Options:
  • A 712
  • B 136
  • C 16
  • D 2336
Solution:
2941 Upvotes Verified Answer
The correct answer is: 2336

W e know Pi=16k2+5k=1

6k2+5k-1=0

6k2+6k-k-1=0

6k-1k+1=0k=-1 (rejected) ; k=16

PX>2=k+2k+5k2

=16+26+536=6+12+536=2336

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