A batsman makes a score of 84 runs in the 17th inning and thus increases his averages by 3.Find his average after 17th inning? Choose the correct choice from the following options:
A) 19
B) 29
C) 36
D) 49
E) 59

Rationale: "let the average after 17 th inning = x then average after 16 th inning = ( x - 3 ) therefore 16 ( x - 3 ) + 84 = 17 x therefore x = 36 answer : c"
Answer: C