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Question

Q5) A batsman has a certain average runs for 11 innings. In the 12th inning he made a score of 90 runs and thereby decreased his average by 5. His average after 12th inning is:

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Solution

The correct option is **B** (b) 145

**Ans. **

Let the average in 11 innings = x

Given

Let the average in 11 innings = x

Given

(11x+90)/12 = x-5

(11x+90) = 12 * (x-5)

(11x +90 ) = 12x - 60

11x + 90 = 12x - 60

60+90 = 12x - 11x

Therefore x = 150

x = 150 and hence the average after 12 innings will be 150-5 = 145

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