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How Do You Find an Average?

What is an average?

Summary

  1. Each 'a' here represents a different number in the set
  2. The 'n' represents how many different 'a's we have
  3. To find the average, add all the elements in the set together
  4. Then divide by the total number of elements in the set, 'n'
  5. Add together all the elements in the set: 12+13+10+15+5
  6. Divide that by the total number of elements, 5
  7. 12+13+10+15+5=55
  8. 55/5 gives us 11 for our average

Notes

    1. The elements of a set are the numbers contained in the braces
    1. To find the number of elements, just count how many numbers are inside your braces
    1. Each 'a' is a different number in the set
    2. 'n' is the total number of elements in the set
    1. 12, 13, 10, 15, and 5 are the elements in our set
    1. We need to add 12+13+10+15+5 to get the numerator of our fraction
    1. Our set has 5 elements: 12, 13, 10, 15, 5
    1. Our set has 5 elements: 12, 13, 10, 15, 5
    2. So 5 becomes the denominator of our fraction
    1. Add the elements of the set to get 55 in the numerator
    1. Then divide by 5 to get 11
    2. 11 is our average
    1. Taking a sum means to add
    2. The number of elements is just how many numbers are in the set