The average score of a cricketer for 13 matches is 42 runs. If the average score for the first 5 matches is 54, then what is his average score (in runs) for last 8 matches?
The average score of a cricketer for 13 matches is = 42 runs
Total score in 13 matches will be = 42*13 = 546
Total score of first 5 matches will be = 54*5 = 270
Hence, total score of last 8 matches = 546-270 = 276
So average of the last 8 matches will be = $$\frac{276}{8} = 34.5$$
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