# 0.1.2 - Summations

0.1.2 - Summations\(\Sigma\)

This is the Greek capital letter "sigma." In math, this symbol is also known as a summation. This tells us that we should add a series of numbers (i.e., take the sum).

## Example: Candy

Four children are counting how many pieces of candy they each have. They want to know how many pieces of candy they have all together.

Child | Pieces of Candy |
---|---|

Jenny | 9 |

Carrie | 8 |

Eugenia | 10 |

Kevin | 8 |

If we wanted to know how many total pieces of candy the group of children had, we could add these four numbers. The notation for this is \(\sum x_{i}\).

\(\sum x_{i}=9+8+10+8=35\)

Combined, the four children have a total of 35 pieces of candy.