Please help will mark brainiest There were 300 books on a shelf. 30% of the books were fiction books and the rest were non-fiction books. When another 120 books were added, the percentage of non-fiction books increased to 75%. How many fiction books were added to the shelf?

Before:
Fiction= ___% of 300 =

non-fiction= ___% of 300 =

after adding 120 books:
300 books + 120 books =
75% = books
Fiction books:

Apoll is being conducted at a mall nothingto obtain a sample of the population of an entire country. what is the frame for this type of​ sampling? who would be excluded from the survey and how might this affect the results of the​ survey? what is the frame for this type of​ sampling? a. the frame is people who need new clothes. b. the frame is people who shop at the mall. c. the frame is people who like to shop. d. the frame is the entire population of the country. who would be excluded from the survey and how might this affect the results of the​ survey? a. any person that does not need new clothes is excluded. this could result in sampling bias due to undercoverage. b. any person who does not shop at the mall is excluded. this could result in sampling bias due to undercoverage. c. any person who does not shop at the mall is excluded. this could result in nonresponse bias due to people not participating in the poll. d. there is nobody that is being excluded from the survey.