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in a certain class, the ration of passing grades to failing grades is 9 to 3. If 17 grades were failing, how many passing grades were there?
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in a certain class, the ration of passing grades to failing grades is 9 to 3. If 17 grades were failing, how many passing grades were there?

User Nims Patel
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(9)/(3) = (x)/(17) cross multiply 3x=17*9=153 x= (153)/(3) =51
User Rahat Ahmed
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