What is the Angular Velocity of Two Combined Disks?

[andrewp7]

Homework Statement

A disc off a mass m1 is spinning freely at omega1(w1). A second disk of the same radius but smaller mass m2=m1/4 is dropped onto the first , and it sticks. What is the angular velocity of the two disks

The Attempt at a Solution

I honestly have no idea

 

[PhanthomJay]

I appreciate your honesty. Please read up on on Conservation of Angular Momentum and give it a try, then post again with your relevant equations and an attempt at a solution.