A marketing agency conducts a random survey of 250 people living in a town. The survey finds that 15% of the people are 17 years old or younger; 20% are between 18 and 24 years old; 30% are between the ages of 25 and 49; and 35% are 50 years old or older. Use these survey results to answer any questions that follow.

What inference can be made about the population as a whole?
a There are more 20-year-olds than 30-year-olds.
b More people are 50 years old than any other age.
c The majority of the population is less than 50 years old.
d There are more people under 24 years old than people over 50 years old.