In early 2001, the United States Census Bureau started releasing the results of

Question

In early 2001, the United States Census Bureau started releasing the results of the latest census. Among many other pieces of information, the bureau recoded the race or ethnicity of the residents of every county in every state. From these results the bureau calculated a 'diversity index,' which measures the probability that two people chosen at random are of different races or ethnicities. The census determined that in a county in Wisconsin, 85% of its residents are white, 7% are black, and 8% are asian. Calculate the diversity index for this county.

Explanation / Answer

(0.85*0.07 + 0.07*0.08 + 0.85*0.08 )*2=.2662

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