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Probability Test - 18

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Probability Test - 18
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  • Question 1
    4 / -1
    The probability that in the toss of two dice, we obtain the sum 7 or 11 is
    Solution

  • Question 2
    4 / -1
    If the probability of A to fail in an examination is 0.2 and that for B is 0.3, then probability that either A or B is fail, is
    Solution

  • Question 3
    4 / -1
    A bag A contains 4 green and 3 red balls and bag B contains 4 red and 3 green balls. One bag is taken at random and a ball is drawn and noted to be green. The probability that it comes from bag B is
    Solution

  • Question 4
    4 / -1
    A bag contains 5 white and 3 black balls and 4 balls are successively drawn out and not replaced. The probability that they are alternately of different colours, is
    Solution

  • Question 5
    4 / -1
    If events are independents and P(A) = 1/3, P(B) = 1/3 and P(C) = 1/4, then P(A' ∩ B' ∩ C') is equal to
  • Question 6
    4 / -1
    Two dice are rolled one after the other. The probability that the number on the first is smaller than the number on the second, is
  • Question 7
    4 / -1
    A biased coin with probability p, 0 < p < 1 of heads is tossed until a head appears for the first time. If the probability that the number of tosses required is even is 2 / 5, then p equals
  • Question 8
    4 / -1
    A coin and six faced die, both unbiased, are thrown simultaneously. The probability of getting a head on the coin and an odd number on the die is
    Solution

  • Question 9
    4 / -1
    If A and B are two independent events such that P(A) = 1/2 and P(B) = 1/3, then P(neither A nor B) is equal to
  • Question 10
    4 / -1
    If E and F are two independent events such that 0 < P(E) < 1 and 0 < P(F) < 1, then
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