Question #4df80

1 Answer
Kushagra
Nov 13, 2017

372

Explanation:

4 out of 10 can also be written as 40 out of 100 to make things simpler
Whenever there is a 100 as a denominator, it means it's a percentage, so 40% will need the course,
To take it out
#40/100xx930=x#
Where #x# is the number of students that need a refresher course
Solve
#(4color(forestgreen)cancel0)/(1color(red)cancel0color(forestgreen)cancel0) xx 93color(red)cancel0=x#
#4xx93=x#
It can be easily solved
#372=x#
#therefore 372 # students need a refresher course

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