Correct Answer - Option 4 : 18
Given :
A batsman has an average of 'x' in 6 innings
After scoring 48 runs in 7th innings, increases average by 5 runs
Formula used :
\(Average = \frac {Total \ runs \ scored}{Total \ innings \ played}\)
Calculation :
Average of x in 6 innings
⇒ Total runs in 6 innings = 6x
After scoring 48 runs, the average increased by 5 runs
⇒ \(\frac{6x+48}{7} = x+5\)
⇒ 7x + 35 = 6x + 48
⇒ x = 13
⇒ Average after 7th innings = x + 5
∴ The average run after 7th innings is 18