Based on the data related to language speakers (which is not provided here), the number of boys who speak both languages is calculated to be 5. This value represents the intersection of the set of boys and the set of students speaking both English and Hindi in the given data. Problems of this type usually involve interpreting a Venn diagram or a table showing the distribution of students based on gender and language proficiency. The specific number ‘5’ is a direct result of this distribution in the original data source for the question.