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Tom's mathematics test had $60$ questions: $10$ arithmetic questions, $30$ algebra questions and $20$ geometry questions. Although he correctly answered $70\%$ of the arithmetic questions, $50\%$ of the algebra questions and $50\%$ of the geometry questions, he did not pass the test because he got fewer than $60\%$ of the questions right. How many more questions would he have needed to answer correctly to earn a passing grade of $60\%?$

 May 8, 2021
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Well....let's  see

 

70%  of  the  aritmetic  questions correct  =  7  correct

50% of the algebra  questions correct  =  15 correct

50%  of  the  geometry  questions correct  =  10  correct

 

Total correct =  32

 

To  get  60%, he needs   60 * .60   =  36  correct

 

So.....4  more  correct  answers

 

cool cool cool

 May 8, 2021

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