SOLUTION: This year, 75% of the graduating class had taken 8 math courses. Of the remaining student, 60% had taken 6 or 7 math courses. What percent of the graduating class had taken fewer t

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: This year, 75% of the graduating class had taken 8 math courses. Of the remaining student, 60% had taken 6 or 7 math courses. What percent of the graduating class had taken fewer t      Log On


   

Question 188912: This year, 75% of the graduating class had taken 8 math courses. Of the remaining student, 60% had taken 6 or 7 math courses. What percent of the graduating class had taken fewer than 6 math courses?
Answer by Mathtut(3670) About Me  (Show Source):
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let x be the number of those graduating
:
.75x took 8 math course
:
remaining students would be .25x
:
so .6(.25x)=.15x
:
so .75x have taken 8 courses and .15x have take 6 or 7
:
what we have remaining is x-.75x-.15x=.1x
or 10% of the graduating class have taken fewer than 6 math courses