A batsman makes a score of 100 runs in the 11th inning and thus increases his average by 5. Find his average after 11th inning.  Options:
A) 40	B) 50	C) 62	D) 45	E) 56

Rationale: "let the average after 11 th inning = x then , average after 10 th inning = x - 5 10 ( x - 5 ) + 100 = 11 x x = 100 - 50 = 50 answer is b"
Answer: B