There are three measures of central tendency. **Mean, median, and mode.**

The **mean i**s a typical average. You add up all the numbers then divide by how many numbers you have. In this problem:

83 + 88+87+83+90=431 then

431 divided by 5 = **86.2**

The **median** is the middle number when all the numbers are put in order. In this problem:

83,83,87,88,90

There are five numbers so the third one in from either side is the median, in this case **87**.

The **mode i**s the number that appears most often in the group of numbers. In this problem:

All of the numbers appear once, except 83, which appears twice, therefore the mode is **83**.

**In this problem Nicholas would be best off with the median because it gives him the highest score (87).**

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