What is the mode of the following set? 84,55,10,84,55,120,55,129

The mode is 55.

To find the mode of a set, you need to determine the value that appears most frequently in the set.

In this case, the given set is: 84, 55, 10, 84, 55, 120, 55, 129.

To identify the mode, you can go through the set and count how many times each value appears. The value that appears most frequently is the mode.

Let's count the occurrences of each value:
- 10 appears once
- 55 appears three times
- 84 appears twice
- 120 appears once
- 129 appears once

From this count, we can see that the value 55 appears most frequently, occurring three times. Therefore, the mode of the set is 55.

To find the mode of a set, we need to determine the value that appears most frequently. In the given set, we have the following numbers:

84, 55, 10, 84, 55, 120, 55, 129

To find the mode, we need to count the frequency of each number:

- The number 84 appears 2 times.
- The number 55 appears 3 times.
- The number 10 appears 1 time.
- The number 120 appears 1 time.
- The number 129 appears 1 time.

As we can see, the number 55 appears the most, with a frequency of 3. Therefore, the mode of the given set is 55.