40% female, 3male replaced by female to 44% female how many more males than females are in the original
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2007-10-29 09:04:29 · 6 answers · asked by jennifer 2 in Science & Mathematics ➔ Mathematics
15!!!!
F = 40%
F + 3 = 44% (Subtract)
3 = 4%
It follows
F/40 = 3/4
F = 3 x 40 /4 = 30 females originally,
M = 60%
M-3 = 56% (Subtract)
3 = 4%
It follows
M/60 = 3/4
M = 60 x 3 / 4 = 45 Males originally,
M : F :: 45 : 30
Hence 15 more males.
2007-10-29 09:25:44 · answer #1 · answered by lenpol7 7 · 0⤊ 0⤋
12
2007-10-29 16:20:14 · answer #2 · answered by zuckermaus22 2 · 0⤊ 0⤋
45
2007-10-30 16:20:24 · answer #3 · answered by Anonymous · 0⤊ 0⤋
answer is 15.
basically it's 2 equations, 2 unknowns.
4/10 = F / (M+F)
4.4/10 = (F+3) / (M+F)
solve them, you get M=45, F=30. So there are 15 more males than females originally.
2007-10-29 16:25:48 · answer #4 · answered by weapons hot 3 · 0⤊ 0⤋
neppure non capisco la domanda
2007-10-29 16:12:49 · answer #5 · answered by steve j 4 · 0⤊ 0⤋
forget it xD
2007-10-29 16:15:25 · answer #6 · answered by Anonymous · 0⤊ 0⤋