Three friends, Ella, Jack and Noah, compare how many books they have read this year.
Ella has read 27 books.
Jack has read 35 books.
The mean number of books read by the three friends is 38.
Work out how many books Noah has read.
Answer:
Total books: 3 x 38 = 114
Noah’s books: 114 – 27 – 35 = 52 books