To find the mean of the numbers 66, 33, and 99, you can follow these steps:
1. Add the numbers together:
[tex]\(66 + 33 + 99 = 198\)[/tex]
2. Count how many numbers there are:
There are 3 numbers: 66, 33, and 99.
3. Divide the sum by the count of the numbers:
[tex]\(\frac{198}{3} = 66\)[/tex]
Therefore, the mean of the numbers 66, 33, and 99 is [tex]\( \boxed{66} \)[/tex].
So, the correct option is:
D) 66
