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CASE STUDY (20 Marks) The bulbs manufactured by a company gave a mean life of 3000 hours with standard deviation of 400 hours. If a bulb is selected at random, what is the probability it will have a mean life less than 2000 hours? Answer the following question. Q1. Calculate the probability. Q2. In what situation does one need probability theory? Q3. Define the concept of sample space, sample points and events in context of probability theory. Q4. What is the difference between objective and subjective probability?
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