A person can invite at least 1 people among 6 people in these manners.
- At least 1 people are invited among 6 people. This can be done in 6C1 ways
OR
2. 2 people can be invited among 6 people. This can be done in 6C2 ways.
OR
3. 3 people can be invited among 6 people. This can be done in 6C3 ways
OR
4. 4 people can be invited among 6 people. This can be done in 6C4 ways.
OR
5. 5 people can be invited among 6 people. This can be done in 6C5 ways.
OR
6. All the 6 people can be invited among 6 people. This can be done in 6C6 ways.
Total number of ways = 6C1 + 6C2 + 6C3 + 6C4 + 6C5 + 6C6 ways
= 6 + 15 + 20 + 15 + 6+ 1
= 63 ways.