Question

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

Answer 1

The probability of Mary getting a sandwich with cheese is 1/6, or 17% approximately.

Explanation:

According to the problem, we have 6 types of sandwiches in total.

Also, they prepared equal number of type of sandwich. That means we can treat the problem as units.

Basically, there's one event, which is the sandwich with cheese Mary is choosing. There are 6 total outcomes, all sandwiches types.

The probability is

`P=(1)/(6) \approx 0.17`

Which is equivalent to 17%.

Therefore, the probability of Mary getting a sandwich with cheese is 1/6, or 17% approximately.