Question

The average test mark of the class? mark of a class of 20 student is 65. Twum's mark was recorded as 35 instead of 55. What is the correct average mark of the class

Answer 1

66

Explanation:

Answer 2

66

Explanation:

Wrong total mark = 65 * 20 = 1,300

remainder of Tum score to be added= 55-35 = 20

Add this to total = 20 + 1300 = 1320

Correct average score = 1320/20 = 66