The magician has two pockets. There are three balls in one pocket and four balls in the other. All the balls are different in color.

(1) How many different ways are there to get a small ball from each pocket?

(2) How many different ways are there to take out a small ball from two pockets?

Answer and analysis:

The magician has two pockets. There are three balls in one pocket and four balls in the other. All the balls are different in color.

(1) How many different ways are there to get a small ball from each pocket?

3×4= 12 (species)

(2) How many different ways are there to take out a small ball from two pockets?

3+4=7 (species)