# A binary code is a system of binary numbers with a fixed number of digits that are used to represent letters, numbers, and symbols. To produce enough binary numbers to represent all of the letters of our alphabet, how many binary digits must be used?

##### 1 Answer

Apr 18, 2017

At least

#### Explanation:

The number of possibilities for only one binary digit is

The number of possibilities for two binary digits is

The number of possibilities for three binary digits is

The number of possibilities for

There are