Question

A group of n families, each with m members, are to be lined up for a photograph. In how many ways can the nm people be arranged if members of a family must stay together? Answer only if u r sure. I will report or else.

Answer 1

Answer:

n!*(m!)^n

Step-by-step explanation:

n! ways of permuting the n families.

m! ways of permuting the m family members in each family.

But family members have to stick their own families and there are n of them, so m!^n