A batsman makes a score of 87 in the 17th inning and thus increases his average by 3. What is his average after the 17th inning?
Answer: 39
Explanation
Let the average after 17th innings = x
Then average after 16th innings = (x – 3)
Therefore 16 × (x – 3) + 87 = 17x
Therefore x = 39
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