A team of 5 is chosen from 6 boys and 4 girls. Find the number of ways the team can be chosen if
- there are no restrictions,
- the team contains more boys than girls.
Solution
(i) To find the number of ways to choose a team of 5 from 10 people (6 boys and 4 girls) without restrictions, use the combination formula:
\(\binom{10}{5} = 252\)
(ii) To find the number of ways to choose a team with more boys than girls, consider the possible distributions:
- 5 boys and 0 girls: \(\binom{6}{5} \times \binom{4}{0} = 6 \times 1 = 6\)
- 4 boys and 1 girl: \(\binom{6}{4} \times \binom{4}{1} = 15 \times 4 = 60\)
- 3 boys and 2 girls: \(\binom{6}{3} \times \binom{4}{2} = 20 \times 6 = 120\)
Summing these, the total number of ways is:
\(6 + 60 + 120 = 186\)
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