Given that 49.0% of the U.S. population are male, and 12.1% of the population are over 65 years in age can we conclude that (.49)(.121)=5.93% of the population are men older than 65?
See an explanation below:
No, we are given no information about the number of men compared to the number of women over 65.
While extreme, it could be the case where there are no men over the age of 65 and only women over the age of 65.
Without additional information we cannot make any conclusion about the number of men over the age of 65.