TS EAMCET · Maths · Probability
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 \(\frac{1}{3}\) and the probability that he copies it is \(\frac{1}{12}\). The probability that his answer is correct given that he copied it is \(\frac{1}{6}\). The probability that he knew the answer, given that he has correctly answered it, is
- A \(\frac{6}{7}\)
- B \(\frac{15}{49}\)
- C \(\frac{7}{12}\)
- D \(\frac{10}{13}\)
Answer & Solution
Correct Answer
(A) \(\frac{6}{7}\)
Step-by-step Solution
Detailed explanation
\(E_1\) be an event that the student guess the answer \(E_2\) be the event that the student know that answer \(E_3\) be the event that he copies the answer and \(A\) be the event that the answer is correct Given that,…
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