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Bunuel
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Bunuel
10 percent of all the pigs got cholera and died. And also 50 percent of the pigs that got cholera did not die. What percent of all the pigs got cholera?

(A) 20%
(B) 30%
(C) 35%
(D) 40%
(E) 45%

2x2 matrix
--- c---nc ----total
die-10--- -----
nd--.5x-- ---- --
tota x --- ---- 100
x * 50/100 = 10
x = 20%
IMO A
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1/2 the pigs with cholera did not die, so the other 1/2 with cholera did die. But that's 10% of the pigs, so 20% got cholera in total.
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