13. A Batsman makes a score of 87 runs in the 17th inning and thus increases his average by 3. Find his average after 17th inning.
A.40
B.39
C.52
D.55
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Answer – (B)
Solution:
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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