Step-by-step explanation:
Step 1:
We will calculate the total number of tosses made within the hour

The number of times brown was tossed is given below as

Concept:
At least one of the sides is brown
As you do not know if the die is fair or not, the only way to approximate a probability of rolling a yellow is by making a table of frequencies and record the times you have rolled yellow.
If the number of tosses made in an hour is big enough as to draw a conclusion, then according to the Law of Large Numbers, the probability of rolling a brown in one toss of the die should be

By substituting the values, we will have

Hence,
The final answer is
