A librarian checks 5 novels with pages: 240, 300, 280, 260, and 320. Later he finds that the 260-page count was wrongly written; the correct count is 360. What is the correct average number of pages?
Show answer & explanation
Correct answer: B
Explanation
Given:
Number of pages = 240, 300, 280, 260, 320
Incorrect number = 260
Correct number = 360
Formula:
Average = (Sum of numbers) / (Number of numbers)
Incorrect sum = 240 + 300 + 280 + 260 + 320 = 1400
Correct sum = 1400 − 260 + 360 = 1500
Correct average = 1500 / 5 = 300