Home
Class 12
MATHS
Oil a multiple choice examination with t...

Oil 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?

Text Solution

Verified by Experts

Simplify the problems to solve using probability
We know that we have 3 alternative answer but only 1 is correct
∴ The probability of getting a correct answer `1/3`
​ So the probability of getting an incorrect answer is `(1− 1/3)= 2/3`
Promotional Banner

Topper's Solved these Questions

  • PROBABILITY

    NCERT|Exercise EXERCISE 13.2|18 Videos

  • PROBABILITY

    NCERT|Exercise MISCELLANEOUS EXERCISE|19 Videos

  • MATRICES

    NCERT|Exercise EXERCISE 3.3|12 Videos

  • RELATIONS AND FUNCTIONS

    NCERT|Exercise EXERCISE 1.3|14 Videos

Similar Questions

Explore conceptually related problems

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 guessing?

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 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 (1)(13)/(3^(5)) (2) (11)/(3^(5)) (3) (10)/(3^(5))(4)(17)/(3^(5))

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

A multiple choice emamination 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

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

In an examination, there are 3 multiple choice questions and each question has 4 choices. If a student randomly selects answer for all the 3 questions, what is the probability that the student will not answer all the 3 questions correctly ?

In an entrance test,there are multiple choice questions.There are four possible answers to each question,of which one is correct.The probability that a student knows the answer to a question is 90%. If the gets the correct answer to a question,then find the probability that he was guessing.