How many people need to be in a group to claim that at least

How many people need to be in a group to claim that at least three people have the same birthday?

Here it is given as group there is no specification of group length that means \'n\' number of people present in the group

It is given that atleast 3 people have same birthday in a group .

3 or more that 3 people having same birthday in a group.so,to ensure atleast 3 people having same birthday in a group.

so,to ensure aleast 3people having same birthday .3 people need to be in a group and having same bithday.