[ramaricon]

Originally Posted by Sadistic Sponge

I'm sort of confused by the first one

I took a different approach to this and quickly made a percentage table:

_______I_Lived____I____Died__I__Totals
male___I_70%,28___I__30%, 12_I__100%, 40 (40% of population)
Female_I_30%,18___I__70%,42__I__100%, 60 (60% of population)
Totals__I_100%,46__I_100%, 54 _I__100____

I assumed a population size of 100 for this problem.

I was able to calculate every part of the table just fine, the part I'm struggling with now is:
",what was the ratio that died were male rats,"
Which immediately makes me ask if I am comparing 12:40 or 12:28?

what was the ratio of the death rate among the male rats to the death rate among the female rats"
The male rats had a death rate of 30%
The female rats had a death rate of 70%
Thats a 3/7 ratio...

This is frustrating me, as I have all the information I need but I know I'm doing something silly wrong...

what you are taking is that all the rats have died, that is the 30% of the rats that died were males doesn't signify that it's the 30% of the total male rat population but of the number of rats that have died. i hope it helps