A bowler gives 15.2 runs per wicket. He gives 32 runs and takes 4 wickets in the last match after which his average becomes 14.4 runs per wicket. How many wickets have been taken by him before the last match?
Bowling average = (Total run conceded)/(Total wicket taken) Let the total number of wickets be x Then, bowling average = 15.2 Runs conceded = 15.2x Now, (15.2x+32)/(x+4) = 14.4 15.2x + 32 = 14.4 (x + 4) 15.2x + 32 = 14.4x + 57.6 0.8 x = 57.6 – 32 x = 25.6/0.8 = 32
LCM of 21 5 , 21 10 and 21 15 is?
(1). 21 5
(2). 21 15
(3).2130
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