How many people are there in the row?

In a row, A is 12th from the left and B is 14th from the right. They both interchanged their positions. Now, A becomes 17th from the left. How many people are there in the row?

  1. 31
  2. 27
  3. 30
  4. 29
Anurag Mishra Professor Asked on 14th December 2015 in Maths.
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  • 1 Answer(s)

    Answer: (3) 30

    Explanation:-
    A is 12th from the left and B is 14th from the right.
    Then,
    1    2     3    4    5    6    7    8    9    10    11    A12                  14 (B)   13    12     11     10     9    8      7    6    5    4     3    2      1

    They both interchanged their positions. Now, A becomes 17th from the left .
    1    2     3    4    5    6    7    8    9    10    11    (B) 12  13   14        15      16       17(A)14   13    12     11     10     9    8      7    6    5    4     3    2      1

    Then, the total number of people in the row = 17 + 14 – 1
    = 31 – 1
    = 30

    Hence, the correct answer is option (3) 30.

    Anurag Mishra Professor Answered on 16th December 2015.
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