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On a multiple choice examination with th...

On a multiple choice examination with three possible answers (out of which only one is correct) for each of the five questions, what is the probability that a candidate would get four or more correct answers just by guessing?

A

`(3)/(243)`

B

`(1)/(243)`

C

`(25)/(243)`

D

`(11)/(243)`

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • A multiple choice examination has 5 questions. Each question has three alternative answers of which exactly one is correct. The probability that a student will get 4 or more correct answers just by guessing is

    A
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    B
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    D
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  • In an entrance examinations there are multiple choice question. There are five possible answers to each question of which one is correct. The probability that a student knows the answer to a question is 80%. IF he gets the correct answer to the question, then the probability that he was guessing is

    A
    `1/9`
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    C
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