A batsman in his 20th innings makes a score of 90, and thereby increases his average by 2. What is his average after the 20th innings? He had never been ’not out’.
Choose the correct choice
A) 52	B) 37	C) 39	D) 43	E) 42

Rationale: "average score before 20 th innings = 90 - 2 × 20 = 50 average score after 20 th innings = > 50 + 2 = 52 answer : a"
Answer: A