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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 ?
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- 17.15
- 29.75
- 30.25
- 31
Correct Option: C
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