Angular Velocity of a turntable after weights are added

[doneganstm]

A 2.0 {\rm kg}, 20-cm-diameter turntable rotates at 100 {\rm rpm} on frictionless bearings. Two 500 {\rm g} blocks fall from above, hit the turntable simultaneously at opposite ends of a diagonal, and stick. What is the turntable's angular velocity, in rpm, just after this event?

I'm not quite sure on how to set this one up or what equation to use, can anyone give me a push in the right direction?

 

[tiny-tim]

Welcome to PF!

Hi doneganstm! Welcome to PF!

Hint: conservation of angular momentum.