Derek1988 wrote:why B is wrong?

Let's assume the world consists of 1000 people - 200 left handed and 800 right handed.

The stimulus says that the left handed people are more likely to contract influenza.

Lets say that likelihood for left handed people is 40 % and let's say the likelihood that a right handed person contracts influenza is 20%.

Now in the world number of LH people with influenza = 80, but the number of RH people with influenza = 160. In this group most people who contacted influenza are right handed -> 160 among 240.

Hope it helps

Agree to D