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NDA - Probability Test 1186
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  • Question 1/5
    1 / -0.33
    In a multiple-choice test, an examinee either knows the correct answer with probability p or guesses with probability  The probability of answering a question correctly is  if he or she merely guesses. If the examinee answers a question correctly, the probability that he or she really knows the answer is
  • Question 2/5
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    Five sticks of length 1, 3, 5, 7 and 9 feet are given. Three of these sticks are selected at random. What is the probability that the selected sticks can form a triangle?
  • Question 3/5
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    Consider the following statements:

    1)

    2)

    3) P(A ∩ B) = P(B) P(A | B)

    Which of the above statements are correct?

  • Question 4/5
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    Tickets numbered from 1 to 12 are mixed up together, and then a ticket is withdrawn at random. Find the probability that the ticket has a number which is a multiple of 2 or 3 .
  • Question 5/5
    1 / -0.33
    In class, 30% of the students offered mathematics 20% offered chemistry and 10% offered both. If a student is selected at random, find the probability that he has offered mathematics or chemistry.
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