In an entrance test there are multiple c...

In an entrance test there are multiple choice questions. There are four possible answers to each equation, of which one is correct. The probability that a student knows the answer to a question is `9//10`. If he gets the correct answer to a question, then the probability that the was guessing is

`(37)/(40)`

`(1)/(9)`

`(36)/(37)`

`(1)/(37)`

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

PROBABILITY
AAKASH SERIES|Exercise Exercise-II|130 Videos
PERMUTATIONS & COMBINATIONS
AAKASH SERIES|Exercise PRACTICE EXERCISE|163 Videos
QUADRATIC EQUATIONS & EXPRESSIONS
AAKASH SERIES|Exercise PRACTICE EXERCISE|88 Videos

Similar Questions

Explore conceptually related problems

In a certain recruitment test with multiple choice questions, there are four options to answer each question, out of which only one is correct. An intelligent student knows 90% correct answers while a weak student known only 20% correct answers. If an intelligent student gets the correct answer for a question, then the probability that he was guessing it, is

On a multiple choice examination with three possible answers for each of the five questions. Then what is the probability that a candidate would get four or more correct answer is

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 :

The probability of getting right answer to a question is 0.68, the probability of getting a wrong answer is ………….

In a test, a student either guesses or copies or knows the answer to a multiple choice question with four choices having one correct answer. The probability that he guesses the answer is 1/3 and the probability that he copies it is 1/12 . the probability that his answer is correct given that he copied it is 1/6 the probability that he knew the answer, given that he has correctly answered it, is

AAKASH SERIES-PROBABILITY-Practise Exercise

One compartment of a purse contains three 25 paise coins and 2 one rup...
Text Solution
|
A bag contains 4 white and 2 black balls. Another bag contains 3 white...
Text Solution
|
A,B,C are tossing a coin on the condition that the person who gets a h...
Text Solution
|
There are two bags one of which contains 3 black and 4 white balls, w...
Text Solution
|
There are two boxes. In the first box there are 4 white, 5 black balls...
Text Solution
|
Two persons A and B toss two coins one after another. The person who t...
Text Solution
|
A,B,C are aiming to shoot a balloon. A will succeed 4 times out of 5 a...
Text Solution
|
A and B each throw a die. The probability that A's throw is not greate...
Text Solution
|
Um A contains 6 red and 4 black balls and um B contains 4 red and 6 bl...
Text Solution
|
India plays two matches each with West Indies and Australia . In any ...
Text Solution
|
The probability of India winning a test match against West-Indies is 1...
Text Solution
|
A pair of fair dice is rolled together till a sum either 5 or 7 is obt...
Text Solution
|
The probability that an event A happens in one trial of an experiment ...
Text Solution
|
Suppose there are 3 urns containing 2 white, 3 black balls, 4 white 1 ...
Text Solution
|
In an entrance test there are multiple choice questions. There are fou...
Text Solution
|
A letter is known to have come either from LONDON or CLIFTON, on the p...
Text Solution
|
Observe the following statements : Statement-1 : The probabilities o...
Text Solution
|
If 5 letters are placed in 5 addressed envelopes and A,B,C defines the...
Text Solution
|
Assertion (A) : A fair coin is tossed n times. If the probablities of ...
Text Solution
|
Assertion (A) : The unknown coefficient of the equation x^(2)+bx+3=0 i...
Text Solution
|