SOLUTION: if I took a test and answered 80 questions and received a 95% on my test how many questions did I answer incorrectly

Click here to see ALL problems on Average

Question 984685: if I took a test and answered 80 questions and received a 95% on my test how many questions did I answer incorrectly

Found 4 solutions by vleith, macston, rothauserc, MathTherapy:
Answer by vleith(2983)   (Show Source):
You can put this solution on YOUR website!
The total number of questions is 80. You got a 95%. SO that says you got 95% correct

That means you missed 4

Answer by macston(5194)   (Show Source):
You can put this solution on YOUR website!
.
80 is 95% of (80/0.95=)84.2
If there were 84 questions on the test, you answered 4 wrong.

Answer by rothauserc(4718)   (Show Source):
You can put this solution on YOUR website!
we setup the following ratios
x / 100 = 80 / 95
x = (100*80) / 95 = 8000 / 95 = 84.210526316
x = 84
therefore
84 - 80 = 4
I answered 4 questions incorrectly

Answer by MathTherapy(10555)   (Show Source):
You can put this solution on YOUR website!

if I took a test and answered 80 questions and received a 95% on my test how many questions did I answer incorrectly

Let number of incorrect answers be I
Then number of correct answers = 80 - I

This gives us:
------- Cross-multiplying

Incorrect answers, or , or