A science Museum has announced that on a particular day one of their halls is closed for construction. The museum has 5 halls on the first floor 3 on the second floor and 4 one the third floor. How likely is it that the closed halls is on the second floor? Give the answer as a fraction in the simplest form.

Answer 1

There are a total of 12 halls in the museum. Out of those 12 halls, 3 are on the second floor.

Therefore, the probability that the closed hall is on the second floor is 3/12 = 1/4.