dave13 wrote:
Bunuel shouldn't the answer be 3/7 ?
0.30*40 =12
0.7*60 = 42
\(\frac{12}{42} = \frac{3}{7}\)
Hey Gladi how are you there ?
Gladiator59 It should be 9/14.
You are looking for the ratio of the side effects rate between males and females. To get this you have to get the side effects rate of the males and compare with the side effects rate of the females.
If x = total ducks with side effects, then 0.3x = # of male ducks with side effects, and 0.7x = # of female ducks with side effects.
Male side effects rate = \(\frac{males with side effects}{total male population}\). =\(\frac{0.3x}{40}\)
Female side effects rate = \(\frac{females with side effects}{total female population}\) =\(\frac{0.7x}{60}\)
Therefore, ratio of males to females is:
\(\frac{0.3x}{40}\) : \(\frac{0.7x}{60}\). LCM is 120.
= \(\frac{0.9x}{120}\) : \(\frac{1.4x}{120}\)
=9 : 14
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