1.

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»

Solution :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"!")`


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