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Game Theory and Strategy · End Term · 22 Dec 2024 · September 2024 term · Set QDB1

Question 21: What is the total probability of having the phrase “chec…

Question 21

+1 markOne correct option

Suppose that you receive a piece of e-mail whose subject line contains the phrase “check this out” (a popular phrase among scammers). Based just on this and without looking at the sender or the message content, what is the chance that the message is spam? Suppose that 40% of all your emails are spam and the remaining 60% are emails you want to receive. Suppose that 1% of all spam messages contain the phrase “check this out” in their subject lines, while 0.4% of all non- spam messages contain this phrase.
Based on the above data, answer the given subquestions

What is the total probability of having the phrase “check this out” in subject line of an email?

  1. A

    0.64

  2. B

    0.064

  3. C

    0.0064

  4. D

    0.00064

Show answer

Correct answer

  • C

    0.0064

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Question 21 of 38 in the IIT Madras BS Game Theory and Strategy (Game Theory) End Term paper sat on 22 Dec 2024, in the September 2024 term (IIT M DEGREE AN EXAM QDB3 22 Dec 2024). It carries 1 mark.

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