Answer: Similarly happy as other age group people
Step-by-step explanation:
Happiness is the feeling of pleasure and satisfaction that is achieved by someone through activities, tasks, deed, act, or sometimes without anything.Every age group has certain happiness reasons and factors to be happy.Researches suggest that happiest age group is found to be after 70-years.
According to the question, Mary is as happy as other age group people are because she is pursuing the activities she loves like reading, gardening etc and also has close friend with loving family.She is 75 years old and thus she is having happy life as other people.