A non-uniform meter stick is found to balance on a knife edge at the 60-cm mark. Where is the center of gravity of the meter stick?

	a.	at the 40-cm mark
	b.	at the 45-cm mark
	c.	at the 50-cm mark
	d.	at the 55-cm mark
	e.	at a position not given

Answer is E

would you explain?