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Probability Test - 80
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Probability Test - 80
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  • Question 1/10
    4 / -1
    There are n urns each containing (n + 1) balls such that the ith urn contains ‘i’ white balls and (n + 1 – i) red balls. Let ui be the event of selecting ith urn, I = 1, 2, 3,…,n and W denotes the event of getting a white balls.

    Solutions

  • Question 2/10
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    A box contains 15 tickets numbered 1, 2, …, 15. Seven tickets are drawn at random one after the other with replacement. The probability that the greatest number on a drawn ticket is 9 is
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  • Question 3/10
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    Two square are chosen at random on a chess-board. The probability that they have a side in common is
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  • Question 4/10
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    The probability that a certain beginner t golf gets a good shot if he uses the correct club is 1/3 and the probability of a good shot which an incorrect club is ¼. In his bag are 5 different clubs, only one of which is correct for the shot in question. If he chooses a club at random and takes a stroke, then the probability that he gets a good shot is
    Solutions

  • Question 5/10
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  • Question 6/10
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    A man alternately tosses a coins and throws a dice beginning with the coin. The probability that he gets a head in the coin before he gets a 5 or 6 in the dice is
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  • Question 7/10
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    Two persons ‘A’ and ‘B’ have respectively n + 1 and n coin which they toss simultaneously. Then, the probability that A will have more heads than B is
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  • Question 8/10
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    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
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  • Question 9/10
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    A and B toss a fair coin each simultaneously 50 times. The probability that both of them will not get tail at the same toss is
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  • Question 10/10
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    Three distinct numbers are selected from first 100 natural numbers. The probability that the three numbers are divisible by 2 and 3 is
    Solutions

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