A 200 gm meter stick has two objects attached to it, one of 100gm at the 30 cm mark and the other of 300 gm at the 70 cm mark. Atwhat mark on the

A 200 gm meter stick has two objects attached to it, one of 100gm at the 30 cm mark and the other of 300 gm at the 70 cm mark. Atwhat mark on the meter stick is the center of gravity of thesystem? I need help with the answer. Please show work so I canunderstand how you recieved answer.