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 ?
✅ Correct Answer: (C)
30.25
Explanation: 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
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
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
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