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Let a, b and c be in GP with common rati...

Let a, b and c be in GP with common ratio, r where `a !=0 and 0 lt r le (1)/(2)`. If 3a, 7b and 15 c are the first three terms of an AP, then the 4th term of this AP is

A

a

B

`7/3 a`

C

`2/3 a`

D

5a

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MCGROW HILL PUBLICATION-PROGRESSIONS-Questions from Previous Years. AIEEE/JEE Main Papers
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