There are 1997 doors in the courts. 1997 people came out from each door.One door is closed.That may people came out from each door.This continues till a single person come out of the single open door. Find the no of people inside the court?

• 1996 people will come out since 1 door is closed . After that 1995 , 1994 ................ so no.of people should be ..... summation of 1996+1995+1994+1993+1992.............+1
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