In a certain class, the ratio of passing grades to failing grades is 7 to 5. How many of the 36 students failed the course?
Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM
Expert Answer:
The ratio of passed grades to failed grades is 7 : 5 which tells that, of every 7 + 5 = 12 students, five failed.
i.e., 
of the class failed.
Then, 
= 15
Thus, out of 36, 15 students failed.
Answered by | 4th Jun, 2014, 03:23: PM
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