In the fire academy we had a ratio of 7 to 5 passing grades to failing. how many of the 36 students failed?

could someone explain to me how to do ratios (this problem), it’s been a while.
you

Step-by-step explanation:

The total number of people taking the test was 36

The total of pass / fail in the ratio was 7 + 5 = 12

The ratio of those failing was 5/12

So the number failing was = total * (failing / ratio / total)

Number failing = 36 * 5/12

Number failing = 180 / 12

Number failing = 15

but which class are u may know that first

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation: