Given:
Number of people bought tickets for comedy =
![(2)/(5)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/5jm6oitkd3lorjig5jfw17qliocw7lqrpz.png)
Number of people bought tickets for horror =
![(1)/(4)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/r8zl28n0vf0ogg71i3r53apxva24c1inf4.png)
Number of people bought tickets for kids movie =
![(3)/(10)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/5wqijkf04vjcwyrmczjosx8b5pafrel3pm.png)
To find the number of people who bought tickets for the action movie.
Let us take,
Total number of tickets = 1
Now,
Total number of tickets for comedy, horror and kids movie are =
![((2)/(5) +(1)/(4) +(3)/(10) )](https://img.qammunity.org/2021/formulas/mathematics/college/em93q61kvo0r8tjtp8hksnrqx0mrzo140c.png)
So,
![((2)/(5) +(1)/(4) +(3)/(10) )](https://img.qammunity.org/2021/formulas/mathematics/college/em93q61kvo0r8tjtp8hksnrqx0mrzo140c.png)
LCM of 5,4,10 = 20
=
![(8+5+6)/(20)](https://img.qammunity.org/2021/formulas/mathematics/college/27bvcqw3b094q11lwirwsvg62h0kv7uw5d.png)
=
![(19)/(20)](https://img.qammunity.org/2021/formulas/mathematics/college/dn4v1qzcshoq9yq4otjii4u8z0eujuewo3.png)
Rest are action movie's tickets.
Therefore,
Number of action movie tickets =
![1-(19)/(20)](https://img.qammunity.org/2021/formulas/mathematics/college/sgewtjlqz002xf9ukpr87fbxuv8j916cb2.png)
=
![(20-19)/(20)](https://img.qammunity.org/2021/formulas/mathematics/college/mkzwu8gymjrabgyg1oui4y4sckcizojk7k.png)
=
![(1)/(20)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/prbt6gdv20zeawgsl5b52zwaiwyuxwtsfd.png)
Hence,
The number of people who bought the tickets for action movie is
.