A Meter Stick Balances at the 50

Multiple Choice

A meter stick balances at the 50.0-cm mark. If a mass of 50.0 g is placed at the 90.0-cm mark, the stick balances at the 61.3-cm mark. What is the mass of the meter stick?

A) 178 g
B) 89.7 g
C) 73.4 g
D) 127 g
E) 32.6 g