College Algebra, 4th Edition

Applying the Concepts

1. 49. 0.7

2. 51. ${\displaystyle \frac{1}{5}}$

3. 53. ${\displaystyle \frac{47}{50}}$

4. 55. The probability of winning one prize is ${\displaystyle \frac{2}{25}}.$ The probability of winning both is ${\displaystyle \frac{9}{1550}}.$

5. 57.

   1. ${\displaystyle \frac{1}{4}}$

   2. ${\displaystyle \frac{1}{4}}$

   3. ${\displaystyle \frac{1}{2}}$

6. 59.

   1. ${\displaystyle \frac{79}{148}}$

   2. ${\displaystyle \frac{33}{40}}$

   3. 0

   4. 1

   5. ${\displaystyle \frac{119}{120}}$

7. 61. The probability that a ­non-Hispanic white American has no lactose intolerance is ${\displaystyle \frac{4}{5}}.$ The ­probability for the second group is ${\displaystyle \frac{1}{4}}.$

8. 63.

   1. ${\displaystyle \frac{1}{10}}$

   2. ${\displaystyle \frac{1}{10}}$

9. 65. 90; 135; 10; 765

10. 67. Three of one gender and one of the other is more likely.

11. 69.

    1. ${\displaystyle \frac{2}{5}}$

    2. ${\displaystyle \frac{89}{180}}$