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Lie Detector Probability Question

(22 votes, average: 1.14 out of 5)

April 12, 2021 by Ankur 4 Comments

Scientists were trying out a new lie detection test based on a needle. The needle indicates red if it a lie and green if it’s true. For any person lying, there is a 75% chance of the needle pointing towards red. For a person not lying, there is a 90% chance of the needle pointing towards green. It is known that 10% of people who go for the test are lying.

If a person who tests to have lied, If the probability that they actually lied is P, then 11P equals?​

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Comments

  1. Himanshu y says

    November 7, 2022 at 12:34 am

    11

    Reply
  2. Dark Ghoul says

    April 21, 2021 at 5:57 pm

    And is 50 I mean

    Reply
  3. Dark Ghoul says

    April 21, 2021 at 5:56 pm

    I mean 50

    Reply
  4. Dark Ghoul says

    April 21, 2021 at 5:55 pm

    59

    Reply

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