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Probability Test - 33

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Probability Test - 33
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  • Question 1
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    If n positive integers are taken at random and multiplied together, then the probability that the last digit of the product is 2, 4, 6 or 8 is
    Solution

  • Question 2
    4 / -1

    Solution

  • Question 3
    4 / -1

    Solution

  • Question 4
    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 doubled and 8 balls are pulled out. The probability of getting exactly 4 blacks is p2. Then
    Solution

  • Question 5
    4 / -1
    Two persons A and B have respectively n + 1 and n coins, which they toss simultaneously. Then the probability that A will have more heads than B is
    Solution

  • Question 6
    4 / -1

    Solution

  • Question 7
    4 / -1
    On a chess-board if two squares are chosen, the probability that they have a side in common is
    Solution

  • Question 8
    4 / -1
    If a number of two digits is formed with the digits 2, 3, 5, 7, 9 without repetition of digits. The probability that the number formed is 35, is
    Solution

  • Question 9
    4 / -1
    In a game “odd man out” each of m ≥ 2 person tosses a coin to determine who will buy refreshments for the entire group. The odd man out is the one with a different outcome from the rest. The probability that there is a loser in any game is
    Solution

  • Question 10
    4 / -1
    A bag contains n white and n red balls. Pairs of balls are drawn without replacement until the bag is empty. The probability that each pair consists of one white and one red ball is
    Solution

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