Question: The time it takes a randomly selected employee to perform a task is mean a value of 120 seconds and standard deviation of 20 seconds.

The time it takes a randomly selected employee to perform a task is mean a value of 120 seconds and standard deviation of 20 seconds.

Calculate the probability that a randomly selected employee will complete:

2.1.1 The task within 100 to 130 sec (5)

2.1.2 In more than 75sec (5)

2.2 If it is estimated that 30% of all students who fall under the Business Economics and Management Department at Richfield have a valid driver's license. What is the probability of this in a sample of 10 students?

2.2.1 Exactly 4 have a valid driver's license? (5) 2.2.2 At least 2 have a valid driver's license? (5) 2.2.3 More than 9 have a valid driver's license? (5)

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