Find the mode of the following numbers.21, 7, 19, 21, 60, 21, 19

To find the mode of a set of numbers, you need to identify which number appears most frequently in the set.

Here are the steps:

1. List the numbers in the set: 21, 7, 19, 21, 60, 21, 19
2. Count how many times each number appears:
   • 21 appears 3 times
   • 7 appears 1 time
   • 19 appears 2 times
   • 60 appears 1 time
3. Identify the number that appears most frequently. In this case, 21 appears the most times (3 times).

So, the mode of the set of numbers 21, 7, 19, 21, 60, 21, 19 is 21.