Home
Class 12
MATHS
In an examination there are three multip...

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

A

11

B

12

C

27

D

63

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

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 :

There are 10 true-false questions in an examination. The number of ways in which these questions can be answered is

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

A person goes in for an examination in which there are four papers with a maximum of m marks from each paper. The number of ways in which one can get 2m marks 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 ?

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 ?

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.

In an examination, the maximum marks for each of the three papers are 50. Maximum marks for the fourth paper are 100. Find the number of ways in which the candidate can score 60% marks in aggregate.

Statement-1 (Assertion and Statement- 2 (Reason) Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select the correct choice as given below. Statement-1 For a singular matrix A , if AB = AC rArr B = C Statement-2 If abs(A) = 0, thhen A^(-1) does not exist.

Statement-1 (Assertion and Statement- 2 (Reason) Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select the correct choice as given below. Statement - 1 If A is skew-symnmetric matrix of order 3, then its determinant should be zero. Statement - 2 If A is square matrix, det (A) = det (A') = det (-A')