Question

A survey was done to determine the effect of students changing answers while taking a​ multiple-choice test on which there is only one correct answer for each question. Some students erase their initial choice and replace it with another. It turned out that 65​% of the changes were from incorrect answers to correct and that 29​% were from correct to incorrect. What percent of changes were from incorrect to​ incorrect?

Answer 1

6% of the changes were from incorrect to​ incorrect

Explanation:

The sum of the percentages must be 100%.

We have these following percentages

65​% of the changes were from incorrect answers to correct

29​% were from correct to incorrect

P% were from incorrect to incorrect

So

`65 + 29 + P = 100`

`P = 100 - 94`

`P = 6`

6% of the changes were from incorrect to​ incorrect