Q. 3 D5.0( 1 Vote )

Attempt any three

Answer :

Seats in each row are 20, 22, 24, …..

The difference between consecutive terms is constant


It is an A.P with common difference = d = 2 and a = 20.


Also, an = a + (n - 1) × d where an is the nth term of A.P.


a25 = 20 + (25 - 1) × 2


a25 = 20 + 24 × 2


a25 = 68


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