Why does water level drop when floating ice sinks in a denser liquid?

[anigeo]

my textbook says that when a piece of ice is floating in a liquid the (water+liquid) level drops down if the density of ice(water) > density of liquid.
i have no idea how it happens.please help me.

 

[mathman]

Water has a higher density than ice, so your assumption is impossible.

 

[DaveC426913]

Please quote the textbook exactly. There are some subtleties they may not be coming through.