Question

How many three-letter codes can we make using only vowels, a, e, i, o, or u?

Answer 1

5 * 5 * 5 = 125

Answer: 125 codes

Answer 2

Answer and explanation:

Given : Vowels a,e,i,o or u.

To find : How many three-letter codes can we make using only vowels ?

Solution :

1) If we assume that repetition is allowed then

The three letter code can form

`5* 5* 5=125` ways

Number of three-letter codes can we make using only vowels is 125.

2) If we assume that repetition is not allowed then

The three letter code can form

`5* 4* 3=60` ways

Number of three-letter codes can we make using only vowels is 60.