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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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List all the ordered arrangements of 5 objects , and choosing 2 at a time without repetition. What is ?
Through observation, it has been determined that the probability for a given number of people waiting in line at the “5 items or less” checkout register of a supermarket is as follows:
Find the probability of:
(a) At most 2 people in line
(b) At least 2 people in line
(c) At least 1 person in line
Use the information given in the figure.
How many are in A or B?
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?
An urn contains 7 white balls and 3 red balls. Three balls are selected. In how many ways can the 3 balls be drawn from the total of 10 balls:
(a) If 2 balls are white and 1 is red?
(b) If all 3 balls are white?
(c) If all 3 balls are red?
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