请教组合问题中，without replacment,怎么翻译？

xinyp

TT-16-Q27:

A box contains exactly 24 balls, of which 12 are red and 12 are blue.  If two balls are to be picked from this box at random and without replacement, what is the probability that both balls will be red?

这个without replacement怎么翻译呢？谢谢

paulstars

即不用放回去

newyearagain

无放回的，