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If 18, a, b – 3 are in A.P. then a + b =

A. 19 B. 7 C. 11 D. 15 Answer: Option D
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Solution(By Apex Team)

18, a, b – 3 are in A.P., Then, a – 18 = -3 – b ⇒ a + b = -3 + 18 = 15

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