Which theorem claims that the sum of many votes produces a better outcome than the decision of one or a small number of individuals?

Question

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Condorcet's jury theorem states that the accuracy of a group decision increases with the size of the group, assuming individual voters have a better than random chance of being correct. This means that the sum of many votes can produce a better outcome than the decision of one or a small number of individuals. The other options do not address this specific theorem.

Which Theorem Claims That the Sum of Many Votes Produces