CBSE Class 11-science Answered
permutation and combination
Asked by | 17 Mar, 2009, 11:52: PM
Expert Answer
4 bowlers can to be selected from 6 bowlers in C(6,4) ways and we need to select remaining 7 players from a group of 12 players consisting of 2WK and 10 batsmen
At least one wicket keeper means it can be either one WK or 2 WK.
Now,
if there is 1 WK, then there have to be 6 batsmen
and
if there are 2 WK then there can be 5 batsmen
So, the team can be
either
2WK and 5 batsmen[C(2,2)*C(10,5)
or
1WK and 6 batsmen[C(2,1)*C(10,6)]
So, the answer is
C(6,4){[C(2,2)*C(10,5)]+[C(2,1)*C(10,6)]}
Answered by | 18 Mar, 2009, 10:59: PM
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