Answer:
360 members.
Step-by-step explanation:
One fifth ([tex]\frac{1}{5}[/tex]) of the movie audience left the theater. Let the total number of audience be x. Then according to the statement [tex]\frac{1}{5}[/tex] of x audience members left the theater.
We are also told that the number of audience members which walked out was 72. So this means, One-Fifth of the audience members(x) is 72. In equation form we can write this as:
[tex]\frac{1}{5} x =72[/tex]
Multiplying both sides by 5, we get:
[tex]x=72 \times 5\\x=360[/tex]
This means, there were originally 360 members in the audience before 72 of them walked out.