In a recent survey 40% houses contained two or more people. Of those houses containing only one person 25% were having only a male. What is the percentage of all houses which contain exactly one female and no males?
Options:
(A) 75
(B) 40
(C) 15
(D) Cannot be determined
(E) None of these Stream of consciousness first, then make a decision:
Houses containing only one person = 100 40 = 60%
Houses containing only a male = 60 25100 = 15%
Houses containing only one female = 60 15 = 45%
Thus, the answer is (E).