Q. The average score of a batsman after his 50th innings was 46.4. After 60th innings, his average Score increases by 2.6. What was his average score in the last ten innings?
(a) 122
(b) 91
(c) 62
(d) 49
Correct Answer: (c) 62
Question from UPSC Prelims 2020 CSAT Paper
Explanation :
Average score of batsman calculation
After his 50th innings, the batsman’s total score was (50 * 46.4) = 2320.
After his 60th innings, his average score increased to (46.4 + 2.6) = 49. So his total score after 60 innings was (60 * 49) = 2940.
The difference between these two totals is the total score he made in his last ten innings: (2940 – 2320) = 620.
So his average score in those last ten innings was (620 / 10) = 62.
