Q. The average score of a cricketer for 10 matches is 43.9 runs. If the average for the first six matches is 53 , the average for the last four matches is ?
Explanation by: Harikesh
Let the average for last 4 matches be y. Sum of score for 10 matches = sum of score for first 6 matches + sum of score of last 4 matches. So 53 x 6 + 4y = 10 x 43.9 ∴ 4x= 439-318 ⇒4x= 121 ∴ x= 30.25
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