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7 A commuter must pass through 5 traffic lights on her way to work and...

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7 A commuter must pass through 5 traffic lights on her way to work and will have to stop at each one that is red She estimates the probability model for the number of red lights she hits as shown below Complete parts a a X of red 0 3 P X x 0 04 0 16 a How many red lights should she expect to hit each day The commuter should expect to hit Round to one decimal place as needed b What s the standard deviation 1 0 24 2 0 34 4 0 15 5 0 07 red lights each day D The standard deviation is Round the final answer to one decimal place as needed Round all intermediate values to three decimal places as needed

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