Home
Class 12
MATHS
On a multiple choice questions with thre...

On a multiple choice questions with three possible answers for each of the five questions, what is the probability that a candidate would get 4 or more correct answers just by guessing ?

Text Solution

Verified by Experts

The correct Answer is:
`(11)/(243)`
Promotional Banner

Similar Questions

Explore conceptually related problems

In an entrance examination there are multiple dioice questions. Ihere are fous pessibie snswers to each question uf which one is correct. The probabinity that a student knows the answer to a question is 90 %. If he gets the correct answer to the question, then the probability that he was guessing is

An instructor has a question bank consisting of 300 easy true /false questions, 200 difficult true/ false question, 500 easy multiply choice questions and 400 difficult multiple choice questions. If a question is selected at random from the test bank , what is the probability that it will be an easy question given that it is a multiple choice question ?

In answering a question on a multiple choice test a student either knows the answer or gueses . 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 a student knows the answer given that he answered it correctly ?

In a multiple choice question, there are five alternative answers of which one or more than one are correct. A candidate will get marks on the question, if he ticks all the correct answers. If he decides to tick answer all random, then the least number of choices should he be allowed, so that the probability of his getting marks on the question exceeds (1)/(8) is

In a test, an examinee either guesses or copies or knows the answer to a multiple choice question with four choices. The probability that he makes a guess is 1/3 and the probability that he copies the answer is 1/6. The probability that his answer is correct given that he copied it is 1/8. Find the probability that he knew the answer to the question, given that he correctly answered it.

Write the answer of each the question: What is the name fo each part of the plane formed by these two lines ?

Write the answer of each the question: What is the name fo each part of the plane formed by these two lines ?

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 the answer will be correct with probability 1/4. What is the probability that a student knows the answer given that he answered it correctly.

Answer any three of the following questions. b. What is Peptisation ? Give an Example

In an examination there are three multiple choice questions and each questions has 4 choices . Number of ways in which a students can find to get all answers correct is :