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    24 students are sitting in a row. F is 17th from the right end and R is 19th from the left end. How many students are between F and R?
    Question

    24 students are sitting in a row. F is 17th from the right end and R is 19th from the left end. How many students are between F and R?

    A.

    10

    B.

    9

    C.

    11

    D.

    3

    Correct option is A

    Given: 
    24 students are sitting in a row.
    F is 17th from the right end
    R is 19th from the left end.
    From the given information linear image will be: 
    Formula: Number of persons between two different persons = [(Position of person from left + Position of person from right) - Total number of person] - 2
    = 17 + 19 - 24 - 2 
    = 36 - 26 
    = 10 
    Only 10 students are between F and R.
    Thus, the correct option is (a) 10.

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