A batsman makes a score of 87 runs in the 17th inning and thus increases his averages by 3.Find his average after 17th inning? Choose the correct option: A) 19 B) 29 C) 39 D) 49 E) 59

Rationale: "solution let the average after 17 th inning = x . then , average after 16 th inning = ( x - 3 ) average = 16 ( x - 3 ) + 87 = 17 x or x = ( 87 - 48 ) = 39 . answer c"
Answer: C