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Vaibhav Shukla • 4.53K Points
Extraordinary Math 

Q. A batsman has a certain average of runs for 12 innings. In the 13th innings he scores 96 runs thereby increasing his average by 5 runs. What will be his average after 13th innings?

  • (A) 28
  • (B) 32
  • (C) 36
  • (D) 42
Correct Answer - Option(C)
Explanation by: Vaibhav Shukla 
Let the average for first 12 innings is y
According to question ,
⇒ 12y + 96 = (y + 5) x 13
⇒ 13y - 12y = 96 - 65
⇒ y = 31
∴ Average after 13th inning = (31 + 5)= 36

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