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Probability Test - 12
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  • Question 1/10
    4 / -1
    4 boys and 2 girls occupy seats in a row at random. Then, the probability that the two girls occupy seats side by side is
  • Question 2/10
    4 / -1
    A fair coin is tossed 100 times the probability of getting tails an odd number of time is
  • Question 3/10
    4 / -1
    Out of 3n consecutive natural numbers, 3 natural numbers are chosen at random without replacement. The probability that the sum of the chosen numbers is divisible by 3, is
  • Question 4/10
    4 / -1
    From a group of 8 boys and 3 girls, a committee of 5 members to be formed. Find the probability that 2 particular girls are included in the committee.
  • Question 5/10
    4 / -1
    The probability that the three cards drawn from a pack of 52 cards, are all black, is
  • Question 6/10
    4 / -1
    A determinant of second order is made with the elements 0 and 1. What is the probability that the determinant is positive ?
  • Question 7/10
    4 / -1
    The probability of choosing randomly a number c from the set {l, 2, 3, ... , 9} such that the quadratic equation x2 + 4x + c = 0 has real roots, is
  • Question 8/10
    4 / -1
    Let S be the sample space of the random experiment of throwing simultaneously two unbiased dice with. six faces (numbered 1 to 6) and Ek = {(a, b) ϵ S : ab = k} for k ≥ 1. If pk = P(Ek) for k ≥ 1, then the correct among the following is
  • Question 9/10
    4 / -1
    Three letters, to each of which corresponds an envelope, are placed in the envelopes at random. The probability that all the letters are not placed in the right envelopes, is
  • Question 10/10
    4 / -1
    The odds against a certain event are 5 : 2 and the odds in favour of another independent event are 6 : 5. The probability that atleast one of the events will happen is
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