Suppose that 25% of all wise people are nice and half of all nice people are wise. Suppose further that 25% of all people are neither wise nor nice. What percent of all people are both wise and nice?
2007-08-29 10:57:08 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
15%.
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Note to the answer below:
If 18.75 % are both wise and nice, then 18.75 % are nice but not wise („half of all nice people are wise“) and 56.25 % are wise but not nice („25% of all wise people are nice“). We know that „25% of all people are neither wise nor nice“. It follows, that there are 18.75+18.75+56.25+25 = 118.75 % people altogether. Isn’t it too much?
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2007-08-29 11:06:46 · answer #1 · answered by oregfiu 7 · 1⤊ 1⤋
75% of 25% = 3/4 x 1/4 = 3/16 or 18.75 %
2007-08-29 18:08:25 · answer #2 · answered by CPUcate 6 · 1⤊ 2⤋
25% silly.
2007-08-29 18:01:43 · answer #3 · answered by dstreet 1 · 0⤊ 3⤋