A science test, which is worth 100 points, consists of 24 questions. Each question is worth either 3 points or 5 points. If x is
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a) n (No. of peoples) = 50
r (No. of prizes) = 3
p(n,r) = p (50,3)
b) n(No. of players)=14
r (No. of players for Batting)=9
c)n(Total applicants)=30
r(tester positions)=4