Question

How many 3 letter code can be formed by using the five vowels without repetitions?

Answer 1

$A,E,I,O,U$

No repetition

$3$ Letter code

Selecting and Averaging $3$

${\Rightarrow }^5{P}_3\Rightarrow \frac{5!}{2!}\Rightarrow 5\times 4\times 3\Rightarrow 60$

Hence the correct answer is $60$ Ways are possible.