Question: A micropaleontologist has 5 vials containing samples from 3 different geological eras: 2 from Era A, 2 from Era B, and 1 from Era C. If she selects 3 vials at random, what is the probability that all 3 vials are from different eras?

Wed, 06 May 2026 11:10:47 +0000

**A micropaleontologist has 5 vials from three geological eras—2 from Era A, 2 from Era B, and 1 from Era C. If she picks 3 randomly, what’s the chance they all come from different eras?** When it comes to understanding Earth’s deep history, micropaleontology reveals fascinating glimpses into ancient oceans and life forms preserved in tiny fossils. A recent question shared by researchers and science educators centers on a subtle probability challenge: if a micropaleontologist selects three vials from a collection of five—two from Era A, two from Era B, and one unique Era C—what is the chance all three samples belong to distinct eras? This question isn’t just about numbers—it reflects a growing curiosity in scientific data literacy. As more people engage with STEM topics through online learning and educational platforms, queries like this highlight the need for clear, accessible explanations of probability in real-world research contexts. Understanding how such probabilities unfold helps readers grasp how scientists assess sampling across varied datasets, even in niche fields. **Why This Question Matters Now**