Math

The right side of the orchestra section of the Nederlander Theatre in New York City has 19 rows, and the last row has 27 seats. The number of seats in each row increases by 1 as you move toward the back of the section. How many seats are in this section of the theatre?

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asked by alexis
  1. this is just a simple arithmetic progression, with

    a = 19
    d = 1

    Since there are 27-9+1=9 rows,

    S9 = 9/2 (19+27) = 207

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    posted by Steve
  2. u are wrong my friend

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