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Probability Test - 53

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Probability Test - 53
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  • Question 1
    4 / -1
    A bag contains 6 red, 5 white balls. Two balls are drawn. The probability that none of them is red, is
    Solution

  • Question 2
    4 / -1
    A bag contains 3 white and 5 black balls. If one ball is drawn, then the probability that is black is
    Solution

  • Question 3
    4 / -1
    Three of the six vertices of a regular hexagon are chosen at random. The probability the triangle with these three vertices is equilateral, is equal to
    Solution

  • Question 4
    4 / -1
    Three mangoes and three apples in a box. If two fruits are chosen at random, the probability that one is a mango and the other is an apple is
    Solution

  • Question 5
    4 / -1
    There are 5 volumes of Mathematics among 25 books. They are arranged on a shelf in random order. The probability that the volumes mathematics stand in increasing order from left to right (the volumes are not necessarily kept side by side) is
    Solution

  • Question 6
    4 / -1
    A cricket team ah 15 members, of whom only 5 can bowl. If the names of the 15 members are put into a hat and 11 drawn at random, then the chance of obtaining an eleven containing at least 3 bowlers is
    Solution

  • Question 7
    4 / -1
    A bag has 13 red, 14 green and 15 black balls. The probability of getting exactly 2 blacks on pulling out 4 balls is p1. Now the number of each colour ball is doubles and 8 balls are pulled out. The probability of getting exactly 4 blacks is p2. Then
    Solution

  • Question 8
    4 / -1
    If m rupee coins and n ten paise coins are placed in a line, then the probability that the extreme coins are ten paise coins is
    Solution

  • Question 9
    4 / -1
    A mapping is selected at random from the set A = {1, 2,…,n} into itself. The probability that the mapping selected is an injection is
    Solution

  • Question 10
    4 / -1
    A lot consists of 12 good pencils, 6 with minor defects and 2 with major defects. A pencil is chosen at random. The probability that this pencil is not defective is
    Solution

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