Que: The time taken to assemble a machine in a certain plant is a random variable having a normal distribution of 32 hours and a standard deviation of 3.6 hours. What is the probability that a machine can be assembled at this plant in less than 25.4 hours?

a. 0.61
b. 0.674
c. 0.298
d. 1.823
Answer: 0.298

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