Question

it affects twice as many males as females

Answer 1

In math, when it says twice as many girls as boys?

That means the # of girls is 2 times the # of boys. 
In other words, it takes the number of boys times 2 to equal the number of girls. 

Example: 
1 boy, 2 girls. 
2 x B = G 
2 x (1 boy) = (2 girls)

https://answers.yahoo.com/question/index?qid=20090419053225AAZ2VH6 

 

"Twice as many A as B" means A is two times more than B -- or as you put it, A = 2B.

https://www.quora.com/What-does-this-mean-twice-as-many-A-as-B

 

 

Answer 2

مردان را دو برابرِ زنان تحت تأثیر قرار می‌دهد.