Multiple choice

In the Grade 3 classroom library of Springfield Primary School, there are 34 short story books, and the average number of pages in each of the books is 32. Ms. Williamson, the class incharge, purchases a new book and keeps in the library; so, the average number of pages in each book increases by 1. Find the number of pages in the new book purchased by Ms. Williamson.

  1. 59

  2. 67

  3. 68

  4. 71

  5. 75
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Initial total pages = 34 * 32 = 1088. New number of books = 35. New average = 33. New total pages = 35 * 33 = 1155. Pages in the new book = 1155 - 1088 = 67.

AI explanation

The total number of pages in the original 34 books is 34 multiplied by 32, which equals 1088 pages. When the new book is added, the library has 35 books and the new average becomes 33 pages, making the new total 35 multiplied by 33, which equals 1155 pages. The number of pages in the new book is the difference between the new total and the old total, so 1155 minus 1088 equals 67 pages.

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