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A gene array used to determine which genes are being transcribed under certain experimental conditions contains...

A gene array used to determine which genes are being transcribed under certain experimental conditions contains 500 genes. A genetic algorithm is used to determine which promoters most likely resulted in the pattern of gene array data found in an experiment. This algorithm requires selection (randomly) of a list of 20 genes out of the 500 genes on the array. (No gene can appear more than once in a single list, and the order of the list is not important.) If two such 20-gene lists are selected randomly, what is the probability that they have at least one gene in common?

math   Statistics-And-Probability   
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ns -The ligt of genes in the dist -600 500720 2o ditment 8o 500 among 500 con b 二0.31958 1- 7rohabiluty of one gen is Coono

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