Did a student should be master in one subject or average in every subject?

It ultimately depends on the student's goals and interests. Mastering one subject can lead to deep expertise and opportunities in that field, while being average in multiple subjects can provide a well-rounded education and versatility. Students should consider their career aspirations and personal passions when deciding whether to specialize or maintain a broader focus. Balancing both depth and breadth can be beneficial, depending on individual circumstances.