SOLUTION: I received a 84 on a test and there was 50 questions and questions are worth four points apiece how many did I miss on the test

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Question 925799: I received a 84 on a test and there was 50 questions and questions are worth four points apiece how many did I miss on the test
Found 2 solutions by TimothyLamb, MathLover1:
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
number of correct answers:
50*(0.84) = 42
number of wrong answers:
50*(1 - 0.84) = 8
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solution:
you missed 8 questions
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Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
maximum you can receive on a test is 100%
if there was 50 questions, each question is worth 2 not 4 points
if you received a 84 on a test, then
84%=84%2F100
%2884%2F100+%2950=0.84%2A50+=+42 correct answers
therefore 50+-+42+=+8 incorrect answers
8 incorrect answers, each worth 2 points gives you a total of 16 points or
8=%28x%2F100%2950
8=5x%2F10
80=5x
80%2F5=x
x=16%

and 84%2B16=100%