Question

18 mice were placed in two experimental groups and one control groups with all groups equally large. In how many ways can the mice be placed into three groups ?

Answer 1

It is given that 18 mice were placed equally in two experimental groups and one control group i.e., three groups.
`therefore` Required arrangements `= ("Total arrangement")/("Equally likely arrangement") = (18"!")/(6"!"6"!"6"!")`