In a recent survey, 40% house contained two or more people Of these house containing only one person, 25%
were having only a male . What is the percentage of all house , which contain exactly one female and no makes. ?
Let the total number of house be `x`. Then,
`:.` Number of house having one female only = (100 - 25)% of (100 - 40)% of `x`
= `(75/100 xx 60/100 xx x) = 9/20 x`
`:.` Required percentage = `((9x)/(20) xx 1/x xx 100)`% = 45%
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