No cheating/googling.
Tip to the right - the ping pong ball is +ve buoyant, so it will have an upward force pulling on the left side to tip it right.
Stay where it is, the steel ball is supported by the string transferring it's weight onto the frame. The Ping pong ball only acts on the water it's in and either way the mass of water stays the same in both flasks.
Well that's what I reckon without looking
Tips to the right (steel ball side) as the buyount forces on the left are cancelled out by Newtons third law.
(Source for that answer = google)