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In a cricket championship, there are 21 matches.
Question 1:
In a cricket championship, there are 21 matches. If each team plays one match with every other team,
the number of teams is
A.
7
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Let n be the number of teams.
nC2 = 21
(n(n-1)/2) = 21
n(n-1) = 42
n = 7
B.
9
C.
10
D.
None of these
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Practice Permutations Online Test 3 | Englishfreetest.com
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