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22 Oct 2019, 03:08
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In a class 40% of the students enrolled for Math and 70% enrolled for Economics. If 15% of the students enrolled for both Math and Economics, what % of the students of the class did not enroll for either of the two subjects?
A. 0%
B. 5%
C. 15%
D. 25%
E. 35%
A. 0%
B. 5%
C. 15%
D. 25%
E. 35%
23 Oct 2019, 17:42
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Consider enrollment for math and economics to be exclusive.
40%+70%=110%
If 15% enrolled for both classes, that number can be subtracted from the original sum:
110%-15%=95%
The 5% remaining would be those students who did not enroll for either class.
Ans=B
40%+70%=110%
If 15% enrolled for both classes, that number can be subtracted from the original sum:
110%-15%=95%
The 5% remaining would be those students who did not enroll for either class.
Ans=B
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23 Oct 2019, 23:41
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Bunuel
In a class 40% of the students enrolled for Math and 70% enrolled for Economics. If 15% of the students enrolled for both Math and Economics, what % of the students of the class did not enroll for either of the two subjects?
A. 0%
B. 5%
C. 15%
D. 25%
E. 35%
A. 0%
B. 5%
C. 15%
D. 25%
E. 35%
Let total number of students be = 100
Students enrolled for Math = 40% of 100 = 40
Students enrolled for Economics = 70% of 100 = 70
Students enrolled for both Math and Economics =15% of 100 = 15
Let the students of the class did not enroll for either of the two subjects be = x
Total = Math + Economics - Both + Neither
100 = 40 + 70 - 15 + x
100 = 110 - 15 + x
100 = 95 + x
x = 100 - 95 = 5
Therefore the students of the class did not enroll for either of the two subjects = 5%
Answer B
