Answer: Option 'b' is correct.
Step-by-step explanation:
Since we have given that
Number of people who are working full time = 10 million
Number of people who are working part = 5 million
Number of people who are interested in working and looking for work = 5 million.
As we know that
Total labor force = Total employed people + Total unemployed people
So, it becomes
[tex](10+5)+5\\\\=15+5\\\\=20\ millions[/tex]
Hence, Option 'b' is correct.