Home
Class 12
MATHS
On a multiple-choice exam with 3 possibl...

On a multiple-choice exam with 3 possible destructive for each of the 5 questions, the probability that a student will get 4 or more correct answers just by guessing is

A

`(11)/(243)`

B

`(3)/(8)`

C

`(1)/(242)`

D

`(5)/(243)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • SAMPLE PAPER - 18 (UNSOLVED)

    FULL MARKS|Exercise PART - II (II. Answer any seven questions. Questions No. 30 is compulsory.)|8 Videos

  • SAMPLE PAPER - 18 (UNSOLVED)

    FULL MARKS|Exercise PART - III (III. Answer any seven questions. Questions No. 40 is compulsory.)|8 Videos

  • SAMPLE PAPER - 17

    FULL MARKS|Exercise PART - IV|7 Videos

  • SAMPLE PAPER - 19 (UNSOLVED)

    FULL MARKS|Exercise PART - IV (IV. Answer all the questions.)|14 Videos

Similar Questions

Explore conceptually related problems

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

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 guessing is

A multiple choice examination has ten questions, each question has four distractors with exactly one correct answer. Suppose a student answers by guessing and it X denotes the number of correct answers, find (i) binomial distribution (ii) probability that the student will get seven correct answers (iii) the probability of getting at least one correct answer.

For a question on probability the student's answer was 3/2 . The teacher told that the answer was wrong. Why ?

In answering a question on a multiple choice test, a student either knows the answer or guesses. Let 3/4 be the probability that he knows the answer and 1/4 be the probability that he guesses. Assuming that a student who guesses at the answer will be correct with probability 1/4 . What is the probability that the student knows the answer given that he answered it correctly ?

In answering a question on a multiple choice test, a student either knows the answer or guesses. Let (3)/(4) be the probability that he knows the answer and (1)/(4) be the probability that he guesses. Assuming that a student who guesses at the answer will be correct with probability (1)/(4) What is the probability that the student knows the answer given that he answer it correctly?

In an examination there are 4 multiple choice questions and each question has four choices of which only one is correct. Number of ways in which a student fails to get all the answers correct, if he had attempted all the questions is