In a mountainous region study, 80% of villages rely on hydropower, 65% use biomass, and 50% use both. If there are 200 villages, how many depend on exactly one energy source?

March 11, 2026

In a mountainous region study, 80% of villages rely on hydropower, 65% use biomass, and 50% use both—if there are 200 villages, how many depend on exactly one energy source?
Among growing conversations about sustainable energy in remote communities, a recent regional analysis reveals a striking energy dynamic. With 80% of mountain villages powered by hydropower, 65% relying on biomass, and nearly half—which means 100 villages—using both, a clear question emerges: how many villages depend on only one energy source? Understanding this breakdown helps clarify infrastructure patterns, informs policy planning, and supports sustainable development in isolated regions—especially in the U.S

So, 100% - 85% = <<100-85=15>>15% use neither.
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Total using exactly one = 60 + 30 = <<60+30=90>>90.
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In a mountainous region study, 80% of villages rely on hydropower, 65% use biomass, and 50% use both. If there are 200 villages, how many depend on exactly one energy source?

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