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A recent survey in Montana revealed that 20% of the vehicles traveling on highways, where speed limits are posted at 70 miles per hour, were

A recent survey in Montana revealed that 20% of the vehicles traveling on highways, where speed limits are posted at 70 miles per hour, were exceeding the limit. Suppose you randomly record the speeds of 10 vehicles traveling on US 131 higway. Let X denote the number of vehicles that were exceeding the limit.

What is the probability that exactly 4 vehicles were exceeding the limit?

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