A group has 70 members. For any two members and there is a language that speaks but does not, and there is a language that speaks but does not. At least how many different languages are spoken by this group?
Source: Quantnet
A group has 70 members. For any two members and there is a language that speaks but does not, and there is a language that speaks but does not. At least how many different languages are spoken by this group?