Let's find total marks obtained by sayan if he answered 6 question correctly and 6 questions answered incorrectly.

Rehana and sayan both appered for an examination & each of them will have to answer 12 questions (i) Rehana got 36 marks in total by answering 8 questions correctly and remaining 4 questions incorrectly. If she got 6 marks for each correct answers. (ii) Sayan got 6 questions correctly and remaining 6 questions incorrectly. Let's find total marks obtained by him.

Rehana and sayan both appeared for an examination & each of them will have to answer 12 question (i) Rehana got 36 marks in total by answering 8 questions correctly and remaining 4 questions incorrectly. If she got 6 marks for each correct answer, let's find total marks obtained by her.

In a test an examine 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 the 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 joseph answered 15 question, of which 9 answers were correct answers but the remaining 6 were incorrect. If he gets 5 marks for each correct answer and his total is 33, let 's find the marks alloted for incorrect answer in the examinations.

In an examination, 20 questions of true-false type are asked. Suppose a student tosses a fair coin to determine his answer to each question. If the coin falls heads, he answers 'true', if it falls tails, he answers 'false'. Find the probability that he answers at least 12 questions correctly.

Find the total number of ways of answering five objective type questions, each question having four choices

Mizanoor, Tiratha and nafura appeared for an examination, there were 10 Question in the examination. In this examination one will get 5 marks for each correct answer and -2 marks for each incorrect answer. A) Nafura has got 3 correct and remaning 7 incorrect answers.let's find what is the marks obtained by Nafura.

A student answers a multiple choice question with 5 alternatives, of which exactly one is correct. The probability that he knows the correct answer is p, 0 lt p lt 1 . If he does not know the correct answer, he randomly ticks one answer. Given that he has answered the question correctly, the probability that he did not tick the answer randomly, is

Mizanoor, Tiratha and nafura appeared for an examination, there were 10 Question in the examination. In this examination one will get 5 marks for each correct answer and -2 marks for each incorrect answer. A) Mizanoor has got 6 correct and rest 4 incorrect answers.