Answer: Choice B) 83%
This value is exact
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Explanation:
Add up everyone in the "has a pet" column to get 22+78 = 100. So we have 100 people who have a pet.
Add up every value in the "male" row to get 22+66 = 88. So there are 88 males
It's tempting to say that 100+88 = 188 people either have a pet or are male, but we're double counting the 22 males who have a pet (top left corner). So we must subtract that value off to get 188-22 = 166
Another way you could look at it is to add up every value that is either in the "has pet" column or is in the "male" row, giving us: 22+78+66 = 166
So there are 166 people who either have a pet, are male, or both.
This is out of 22+66+78+34 = 200 people total
Divide the two values to get 166/200 = 0.83 = 83%
