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Chapter 13: Q 7. (page 847)
If A and B are finite sets, the Counting Formula states that______.
.
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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?
If the number of elements in a set is a nonnegative integer, we say that the set is _____ .
Find the value of each permutation.
In a survey about the number of TV sets in a house, the following probability table was constructed:
Find the probability of a house having:
(a) 1 or 2 TV sets
(b) 1 or more TV sets
(c) 3 or fewer TV sets
(d) 3 or more TV sets
(e) Fewer than 2 TV sets
(f ) Fewer than 1 TV set
(g) 1, 2, or 3 TV sets
(h) 2 or more TV sets
Use the formula to find the value of each combination.
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