Homework Answers
Five hundred employees were selected from a city's large private companies, and they were asked whether or not they have any retirement benefits provided by their companies.
| Yes | No | Total | |
| Men | 221 | 73 | 294 |
| Women | 157 | 49 | 206 |
| Total | 378 | 122 | 500 |
The probability of the union of events "woman" and "yes":
P(woman or yes)= P(Woman) + P(Yes) - P(Woman and Yes)
= 206/500 + 378/500 - 157/500
= 206+378-157/500
= 427/500
= 0.854
Therefore P(women or yes) = 0.854
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