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Q4. 1. If one card is drawn from a standard pack of 52 playing cards. Let...

Q4.

1. If one card is drawn from a standard pack of 52 playing cards. Let A be the event that it is a black card, and B be the event that it is a Queen or King. What is the probability that both A and B occur?

2. Part 1: If you bought 3 machines of the same specific type and brand from a factory, and machine 1 and 2 broke down after 243 and 352 hours respectively. However, machine 3 is working after 500 hours yet. What is the failure rate of the this brand and type of machine?

Part 2: What is the MTBF?

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