SOLUTION: In school B, 10% students failed in science, 20% failed in commerce and 30% failed in arts. What is the percentage of failures in school B? (a)15 (b) 25 (c) 12 (d) 12 1/2 (

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: In school B, 10% students failed in science, 20% failed in commerce and 30% failed in arts. What is the percentage of failures in school B? (a)15 (b) 25 (c) 12 (d) 12 1/2 (      Log On


   

Question 294696: In school B, 10% students failed in science, 20% failed in commerce and 30% failed in arts. What is the percentage of failures in school B?
(a)15 (b) 25 (c) 12 (d) 12 1/2 (e) 17

Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
Are they the same people who failed in each course?
Do all the students take all of those courses?
Are there other courses?
And how do you know?
Let's say there are 100 students
10 failed science
20 failed commerce
30 failed arts
That is 60 failures out of 100. 60/100 3/5
or is it 60 out of 300. 60/300= 20/100=1/5