# Questions (235)

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Exercise 1-4.2 A telephone switching center survey indicates that one of four calls is a business call, that one-tenth of business calls are long distance, and one­ twentieth of nonbusiness calls are long distance. a) What is the probability that the...
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Exercise 1-5.2 Using the algebra of sets show that the following relations are true: a)" Au(AnB)=A b) AU(AnB)=AuB
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Exercise 1 -7.1 Using the data of Table 1 -3, find the probabilities: a) a 1 000-n resistor that is selected came from bin 4. b) a 1 0-Q resistor that is selected came from bin 3.
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1-1.1 A six-cell storage battery having a nominal terminal voltage of 12 V is connected in series·with an ammeter and a resistor labeled 6 Q. a) List as many random quantities as you can for this circuit. b) If the battery voltage can have _ any valu...
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1-4.5 A company manufactures small electric motors having horse power ratings of 0.1, 0.5, or 1 .0 horsepower and designed for operation with 120 V single-phase ac, 240 V single-phase ac, or 240 V three-phase ac. The motor types can be distinguished ...
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1-5.5 If A and B are subsets in he same space S, find a) (A - B) n (B - A) b) (A- B) nB c) (A -B) u (An B)
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1-7.1 In a digital communication system, messages are encoded into the binary symbols O. and 1. Because of noise· in the system, the incorrect symbol is sometimes received. Suppose that the probability of a 0 being transmitted is 0.4 and the probabil...
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1-8.1 When a pair of dice are rolled, let A be the event of obtaining a number of 6 or greater and let B be the event of obtaining a number of 6 or less. Are events A and B dependent or independent?
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