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The first three terms of an A.P. respectively are 3y – 1, 3y + 5 and 5y + 1. Then, y equals

A. -3 B. 4 C. 5 D. 2 Answer: Option C
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Solution(By Apex Team)

2 (3y + 5) = 3y – 1 + 5y + 1 (If a, b, c are in A.P., b – a = c – b ⇒ 2b = a + c) ⇒ 6y + 10 = 8y ⇒ 10 = 2y ⇒ y = 5

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