The average score of a batsman after his 50th innings was 46.4. After 60th innings, his average score…
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?
122
91
62
49
Solution
Total runs after 50 innings $= 50 \times 46.4 = 2320$. New average after 60 innings $= 46.4 + 2.6 = 49$. Total runs after 60 innings $= 60 \times 49 = 2940$. Runs in last 10 innings $= 2940 - 2320 = 620$. Average over last 10 innings $= 620 / 10 = 62$.