Explanation
We are given the following:
• A spinner has 4 equally sized sections labeled A to D.
We are required to determine Addyson's prediction for the number of total spins before the letter D appears 12 times.
Since we know that each section is equal to one another, then their probability is also equal.
The probability of getting a D in 1 spin becomes:

The proportion to find prediction is:

The number of spins Addyson predicts is:

Hence, Addyson's prediction for the number of total spins before the letter D appears 12 times is:
