question_answer 1)

Mother, father and son line up random for a family picture, E : son on one end, F : father in middle. Find P(E/F) Sol. S = {(M, F, S), (M, S, F), (F, S, M), (F, M) S), (S, F, M), (S, M, F)}  

Answer:

. S = {(M, F, S), (M, S, F), (F, S, M), (F, M) S), (S, F, M), (S, M, F)}       where M = mother, F = father and S = son n(S) = 6       E = {M, F, S), (F, M, S), (S, F, M), (S, M, F)}             F = {(M, F, S), (S, F, M)}             Also