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

⇒ a₂₅ = 20 + (25 - 1) × 2

⇒ a₂₅ = 20 + 24 × 2

⇒ a₂₅ = 68

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