Answer: 3 : 2
Step-by-step explanation:
Let A represents the total population of country A and B represents the total population of country B.
According to the question,

⇒ 



⇒ 
But, Again according to the question,
The total population that claims that they are from A = one half of the total population of A and B.
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
The answer is 1.5. We can find this by arranging the data set from least to greatest, 011234, and then finding the middle number. Since the amount of spaces is even, we need to find the number in between 1 and 2. The answer is 1.5!
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Hope this helps!
Well the mode is like the most set it numbers so
The difference is 8.645!!!!!!