This problem can be solved using a Venn diagram to represent the languages spoken by individuals. We are given the total number of speakers for each language and information about overlaps. With one person speaking all three languages and two speaking exactly two languages, we can deduce the number of people speaking only one language. Summing up all these disjoint groups (only Tamil, only Hindi, only Gujarati, Tamil & Hindi only, Hindi & Gujarati only, Tamil & Gujarati only, and all three) provides the total number of people in the group.