MATH

A quiz consists of 90 multiple-choice questions, each with 4 possible answers (A, B, C and D). For someone who makes random guess , A is the correct answer for all the questions. If each right answer carries 4 marks and each wrong answer gives -1/4 marks, what probable marks someone will get? Please give calculation

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asked by ANUP
  1. Seems like he'll get 1/4 of them right, and 3/4 of them wrong. So, I'd expect a score of

    90*(1/4)*4 + 90*(3/4)(-1/4)

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    posted by Steve
  2. This is the FOURTH time ANUP has asked this question.

    How many different answers does he/she need??

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    posted by Writeacher
  3. I guess we'll just keep seeing the question until

    (a) an answer appears that he likes
    (b) the assignment is due
    (c) he posts his own solution

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    posted by Steve
  4. LOL! You're probably right!

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    posted by Writeacher

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