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
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Houses containing only one person = 100 40 = 60%
Houses containing only a male = 60 25100 = 15%
Houses containing only one female = 60 15 = 45% So the answer is: (E).
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In what time a sum of money double itself at 7% per annum simple interest?
Options:
(A) 33 1/8%
(B) 33 1/3%
(C) 14 2/7%
(D) 33 4/3%
(E) 73 1/3%
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P = (P*7*R)/100
R = 14 2/7% So the answer is: (C).
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What percent is 120 of 80?
Options:
(A) 150 %
(B) 134 1/3 %
(C) 135 1/3 %
(D) 140 1/3 %
(E) 143 1/3 %
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120/80 = 3/2
3/2 100 = 300/2 = 150 % So the answer is: (A).
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