Respuesta :

Answer:

5 bits

Explanation:

Most classes have around 20 student with a 5-bit system goes up to 31 ( 1+2+4+8+16) and a 4-bit system(1+2+4+8) goes up to 15. Bits are the 1s and 0s and so a 5-bit system looks like this: 01001(18).