You select a family with four children. If M represents a male child and F a female​ child, the set of equally likely outcomes for the​ children's genders is​ {FFFF, FFFM,​ FFMF, FMFF,​ MFFF, MFFM,​ MFMF, MMFF,​ FFMM, FMFM,​ FMMF, FMMM,​ MFMM, MMFM,​ MMMF, MMMM}. Find the probability of selecting a family with exactly three female children.
The probability of having exactly three female children is nothing.