When a class took a math test, 15% of the class failed, 25% made some mistakes (but didn? t fail), and 24 students got perfect scores. How many students were in the class?

Okay so we have to figure out what percentage passed first let’s add all the percentages

25%+15% = 40%

Now subtract that from 100%

100%-40% = 60%

So 60% of the class passed

Now let’s use x to represent the total number of people on the class

x•0.6 = 24

Now solve for x

x = 40

There are 40 people in the class we figure this out my converting 60% to 0.6 and multiplying it by 40 and getting 24 which is correct