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UPSC Prelims

Mathematics

Theme:

Average / औसत

Q69 2020, Average

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?

एक बल्लेबाज का उसकी 50वीं पारी के बाद औसत स्कोर 46.4 था। 60वीं पारी के बाद, उसका औसत स्कोर 2.6 बढ़ जाता है। पिछली दस पारियों में उसका औसत स्कोर क्या था?

Explanation Please wait..

• Average score after 50 innings = 46.4

So, total score after 50 innings = 50 × 46.4 = 2320

Average score after 60 innings = 46.4 + 2.6 = 49

So, total score after 60 innings = 60 × 49 = 2940

Hence, Average score of 10 innings = Runs scored in 10 innings/10 = (2940 – 2320)/10 = 620/10 = 62

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