∴P (touching the white ball) =3/4

∴P (touching the black ball) = 1-3/4= 1/4

There are six black balls.

The number of white balls = 61/4 = 24.

A: It is estimated that there are about 24 white balls in the box.

How many white balls are there now? It should be 18 (24-6= 18).

There may be some mistakes in this topic, so I should ask the original question.

Something like this. I hope it helps? .