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Rohit Sharma scores 120 runs in his tenth innings, that increased his batting average by 3 runs. What is his average after ten innings?
1. 90 
2. 91
3. 92
4. 93

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Correct Answer - Option 4 : 93

Given:

Score in tenth innings = 120 run

Increment in average score = 3 run

Formula used: 

Average = Sum of all observation/Number of observation

Calculation:

Let average of 9 innings be x runs

⇒ Sum of score after ten innings = 9x + 120 

According to the question,

⇒ (9x + 120)/10 = x + 3

⇒ 9x + 120 = 10x + 30

⇒ x = 90 runs

⇒ Average after tenth innings = 90 + 3 = 93 run

∴ The average of Rohit Sharma after tenth innings is 93.

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