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?\nOptions:\n(A) 75\n(B) 40\n(C) 15\n(D) Cannot be determined\n(E) None of these
Step-by-step reasoning process below:
(E)
Houses containing only one person = 100 – 40 = 60%\nHouses containing only a male = 60 × 25⁄100 = 15%\n∴ Houses containing only one female = 60 – 15 = 45%.

Final answer: (E)