First of all, thank you for this question. I was worried before. But after reading your inference just now, I understand. First, ask, "Is your correct answer the third one? My correct answer is the second one. "

On reflection, I think 1 and 3 are wrong.

First of all, the meaning of the question: the prevalence of left-handed people is higher than that of right-handed; Left-handed people are better at mathematical reasoning than right-handed people.

I think the difficulty of this problem is the understanding of meaning.

According to the meaning of the question: only the prevalence rate of left-handed people is high. Number of patients = total number of patients × prevalence rate. The total number of left-handed and right-handed people is uncertain, so the number of patients is also uncertain. Simply put, the prevalence of left-handed people is100% >: The prevalence of right handedness is 50%. If the former is 10 and the latter is 100, then ... so 1 is wrong.

Left-handed people are better at right brain (mathematical reasoning), and a word "Geng" means that they are better at something, and the object "right-handed" is omitted from the title. For example, boys are better at playing games than girls. What do you mean? It can be understood as the proportion of all boys who can play games > the proportion of all girls who can play games back to the topic: the proportion of left-handed people who are good at mathematical reasoning >; Right-handers who are good at mathematical reasoning 10 Left-handers 4 are good at mathematics 10 Right-handers10 are good at mathematics, with a ratio of 40% >: 10%.

2 means that the proportion of left-handed people who are good at mathematics is higher than that who are not good at mathematics: 4/ 14 > 6/96 is correct.

3 means that the proportion of all left-handers who are good at mathematics is greater than that of imprecision and mathematics. 4/ 10 is obviously less than 6/ 10, so 3 is wrong.

This formula will definitely not be formulated in the exam, so we should directly consider that left-handed people are better at mathematical reasoning than right-handed, that is to say, the proportion of left-handed people is greater than that of right-handed, so the proportion of right-handed people who are not good at mathematics is greater than that of left-handed people who are good at/good at+good at/not good at+not good at.