The complete question is
"The cafeteria staff made sandwiches. Each sandwich had either rye or white bread, either ham or turkey, and either cheese or no cheese. The staff made an equal number of each type of sandwich.
The sandwiches were placed on a tray. Without looking, Mary will choose a sandwich.
What are the chances that Mary will get a sandwich with cheese?"
The chances of Mary getting a sandwich with cheese is 1/2.
<h3>How to calculate the number of different ways?</h3>
The number of different sandwiches is calculated by multiplying all of the possibilities for each material being used.
rye or white bread: 2 options
ham or turkey: 2 options
cheese or no cheese: 2 options
So the number of different sandwiches = 2*2*2 = 8.
4 have cheese and 4 have no cheese, as the staff made an equal number of each type of sandwich.
So, The chances of Mary getting a sandwich with cheese is 4/8 = 1/2.
Learn more about possibilities ;
brainly.com/question/15577149
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