A cricketer whose bowling average is 12.4 runs per wicket takes 5 wickets for 26 runs and thereby decreases his average by 0.4. The number of wickets taken by him till the last match was-
বিকল্পসমূহ (নিজের উত্তর যাচাই করতে ক্লিক করুন):
সঠিক উত্তর
3 (85)
বিস্তারিত ব্যাখ্যা ও বিশ্লেষণ:
Solution:
Let the cricketer takes x wickets before last match
Total run = 12.4x + 26
New average = (12.4x + 26) / (x + 5)
ATQ,
(12.4x + 26) / (x + 5) = 12.4 - 0.4
⇒ (12.4x + 26) = 12 (x + 5)
⇒ 12.4x - 12x = 60 - 26
⇒ 0.4x = 34
⇒ x = 34/0.4
= 85
The number of wickets taken by him till the last match was = 85 wickets
