Calligraphy group students

This is a question of combination. I think it should be clear whether every three people are born in groups of 32 or divided into eight groups on average.

If there are 32 people in a group and every three people make one pair, the couplets can be written as follows: (32*3 1*30) divided by (1*2*3)=4960 pairs.

If every three people are divided into eight groups on average, the couplets that can be written are: 8*4=32 pairs.