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IBPS RRB Speed Test 14
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IBPS RRB Speed Test 14
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  • Question 1/10
    1 / -0

    Directions For Questions

    Direction: Answer the questions based on the information given below.

    The bar graph represents the number of balls of different colours present in five different bags (A, B, C, D and E). Each bag contains balls of three colours i.e. Red, Black and White.

    ...view full instructions


    A person transfers 6 white balls from bag C to bag A and then transfers 4 red balls from bag A to bag D . After transferring the balls, he picks 3 balls from bag A. What will be the probability of getting at least two white balls?

    Solutions

    Number of white balls in bag A after transferring = 11

    Number of red balls in bag A after transferring = 6

    Number of black balls in bag A after transferring = 7

    Total number of balls in bag A after transferring = 24

    Required probability = (11C2 × 13C1 + 11C3)/24C3 = 10/23

    So option (C) is the correct answer.

  • Question 2/10
    1 / -0

    Directions For Questions

    Direction: Answer the questions based on the information given below.

    The bar graph represents the number of balls of different colours present in five different bags (A, B, C, D and E). Each bag contains balls of three colours i.e. Red, Black and White.

    ...view full instructions


    Rohit transfers all the balls from bag D to bag E and then from bag E half of the balls of each colour is transferred to bag B. If after transferring, he picks 3 balls from bag E, find the probability of getting at most one black ball.
    Solutions

    Step I: All balls from bag D transferred to bag E

    Number of black balls in bag E =

    Number of red balls in bag E =

    Number of white balls in bag E =

    Step II: Half of each colour of ball transferred to bag B from bag E

    Number of black balls in bag E =

    Number of red balls in bag E =

    Number of white balls in bag E =

    Now, total number of balls in bag E after transferring =

    Required probability = (15C2 × 6C1 + 15C3)/21C3 = 31/38

    So option (D) is the correct answer.

  • Question 3/10
    1 / -0

    Directions For Questions

    Direction: Answer the questions based on the information given below.

    The bar graph represents the number of balls of different colours present in five different bags (A, B, C, D and E). Each bag contains balls of three colours i.e. Red, Black and White.

    ...view full instructions


    Kunal chooses a bag between bag A and bag B after tossing a coin. If head appears, he chooses bag B otherwise chooses bag A. If he picks 4 balls from the bag, then what is the probability that he has picked at least 3 black balls from bag A?
    Solutions

    Probability of choosing bag A =

    Required probability = (1/2) × (7C3 × 15C1 + 7C4)/22C4 = 8/209  

    So option (C) is the correct answer.

  • Question 4/10
    1 / -0

    Directions For Questions

    Direction: Answer the questions based on the information given below.

    The bar graph represents the number of balls of different colours present in five different bags (A, B, C, D and E). Each bag contains balls of three colours i.e. Red, Black and White.

    ...view full instructions


    If all the balls from all the given bags are transferred to a new bag P, then what will be the probability of selecting a red ball from bag P?
    Solutions

    Number of white balls in bag P =

    Number of red balls in bag P =

    Number of black balls in bag P =

    Required probability =

    So option (A) is the correct answer.

  • Question 5/10
    1 / -0

    Directions For Questions

    Direction: Answer the questions based on the information given below.

    The bar graph represents the number of balls of different colours present in five different bags (A, B, C, D and E). Each bag contains balls of three colours i.e. Red, Black and White.

    ...view full instructions


    If Rohit draws 4 balls at random from bag C, then what will be the probability that at least 2 black balls are selected?
    Solutions

    Required probability =

    So option (E) is the correct answer.

  • Question 6/10
    1 / -0

    Directions For Questions

    Direction: Study the following information carefully and answer the given questions.

    Eight friends A, B, C, D, E, F, G and H are sitting around a circular table facing the centre and are at equal distance from each other. D sits exactly between E and H. A is third to the left of G, and G sits opposite to F. A is not the immediate neighbour of B. E is third to the left of C.

    ...view full instructions


    How many people sit between E and B when counted in an anti-clockwise direction from B?
    Solutions
  • Question 7/10
    1 / -0

    Directions For Questions

    Direction: Study the following information carefully and answer the given questions.

    Eight friends A, B, C, D, E, F, G and H are sitting around a circular table facing the centre and are at equal distance from each other. D sits exactly between E and H. A is third to the left of G, and G sits opposite to F. A is not the immediate neighbour of B. E is third to the left of C.

    ...view full instructions


    Who sits second to the left of C?
    Solutions
  • Question 8/10
    1 / -0

    Directions For Questions

    Direction: Study the following information carefully and answer the given questions.

    Eight friends A, B, C, D, E, F, G and H are sitting around a circular table facing the centre and are at equal distance from each other. D sits exactly between E and H. A is third to the left of G, and G sits opposite to F. A is not the immediate neighbour of B. E is third to the left of C.

    ...view full instructions


    In which of the following pairs, is the first person sitting to the immediate left of the second person?
    Solutions
  • Question 9/10
    1 / -0

    Directions For Questions

    Direction: Study the following information carefully and answer the given questions.

    Eight friends A, B, C, D, E, F, G and H are sitting around a circular table facing the centre and are at equal distance from each other. D sits exactly between E and H. A is third to the left of G, and G sits opposite to F. A is not the immediate neighbour of B. E is third to the left of C.

    ...view full instructions


    Who sits second to the Right of A?
    Solutions
  • Question 10/10
    1 / -0

    Directions For Questions

    Direction: Study the following information carefully and answer the given questions.

    Eight friends A, B, C, D, E, F, G and H are sitting around a circular table facing the centre and are at equal distance from each other. D sits exactly between E and H. A is third to the left of G, and G sits opposite to F. A is not the immediate neighbour of B. E is third to the left of C.

    ...view full instructions


    What is the position of F with respect to B in the above arrangement?
    Solutions
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