In a probability experiment, craig rolled a six-sided die 55 times. the die landed on a number greater than three 31 times. what is the ratio of rolls greater than three to rolls less than or equal to three?
a. 31/24

b. 55/31

c. 24/31

d. 31/55

31/55 times he rolled a number greater than 3.
Either you roll a number > 3, or you roll a number ≤3.
55/55 - 31/55 = 24/55 times he rolled a number less than or equal to 3.

Now we want the ratio of 31/55 to 24/55.
Mutliply each side by 55 and we get 31/24.

The quotient of 4/7 and 3/5 is 20/21