Chapter 13: Q 3. (page 847)
True or False? The intersection of two sets is always a subset of their union.
True.
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In a certain lottery, there are ten balls, numbered 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. Of these, five are drawn in order. If you pick five numbers that match those drawn in the correct order, you win $1,000,000. What is the probability of winning such a lottery?
The _____ of an event E is the set of all outcomes in the sample space S that are not outcomes in the event E.
An urn contains 15 red balls and 10 white balls. Five balls are selected. In how many ways can the 5 balls be drawn from the total of 25 balls:
(a) If all 5 balls are red?
(b) If 3 balls are red and 2 are white?
(c) If at least 4 are red balls?
List all the ordered arrangements of 4 objects 1, 2, 3, and 4 choosing 3 at a time without repetition. What is ?
Another game on the “Price is Right” requires the contestant to spin a wheel with numbers 5, 10, 15, 20, .... , 100. What is the probability that the contestant spins 100 or 30?
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