Bowling rate of a bowler was 12.4 per wicket. In the next match, he took 5 wickets by giving 26 runs. After that his bowling rate improved by 0.4 run per wicket. Find number of wicket taken by him before last match?

85

Note: Decreasing the average in number means improvement in the average of a bowler.

⇒ If the previous average = 12.4, then after improving by 0.4, the average = 12.4 - 0.4 = 12

⇒ Average in last 5 matches = \(\frac{26}{5}\) = 5.2

Now using allegation method: