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A school is comprised of 400 people both teachers and students. If 10 percent of the people are teachers and 100 new people enter the school in the following year, how many of those people must be teachers to maintain the percentage of teachers at 10 percent?
A. 10
B. 15
C. 25
D. 35
E. 50
A. 10
B. 15
C. 25
D. 35
E. 50
20 Jan 2017, 04:25
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Bunuel
A school is comprised of 400 people both teachers and students. If 10 percent of the people are teachers and 100 new people enter the school in the following year, how many of those people must be teachers to maintain the percentage of teachers at 10 percent?
A. 10
B. 15
C. 25
D. 35
E. 50
A. 10
B. 15
C. 25
D. 35
E. 50
Hi
We already have 10% and to maintain 10% even after additional 100 person have joined, we have to have 10% teachers in 100..
10/100*100=10
A
20 Jan 2017, 11:44
Kudos
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Bunuel
A school is comprised of 400 people both teachers and students. If 10 percent of the people are teachers and 100 new people enter the school in the following year, how many of those people must be teachers to maintain the percentage of teachers at 10 percent?
A. 10
B. 15
C. 25
D. 35
E. 50
A. 10
B. 15
C. 25
D. 35
E. 50
\(T+C = 400\)
\(T = 40 ; C = 360\)
T + C + 100 = 500
To maintain the same percentage of teacher there must be 50 Teachers
Thus , we need 10 More Teachers ( 50 - 40 = 10 )
Hence, answer will clearly be (A) 10
