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GRE Prep Club Team Member
Joined: 20 Feb 2017
Posts: 2508
Given Kudos: 1053
GPA: 3.39
90 students represent x percent of the boys at Jones Elementary School
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31 Mar 2021, 09:29
31 Mar 2021, 09:29
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90 students represent x percent of the boys at Jones Elementary School. If the boys at Jones Elementary make up 40% of the total school population of x students, what is x?
A. 125
B. 150
C. 225
D. 250
E. 500
A. 125
B. 150
C. 225
D. 250
E. 500
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WE:Education (Education)
90 students represent x percent of the boys at Jones Elementary School
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31 Mar 2021, 10:18
31 Mar 2021, 10:18
3
GeminiHeat wrote:
90 students represent x percent of the boys at Jones Elementary School. If the boys at Jones Elementary make up 40% of the total school population of x students, what is x?
A. 125
B. 150
C. 225
D. 250
E. 500
A. 125
B. 150
C. 225
D. 250
E. 500
\(90 = \frac{x}{100}(B)\) ......... (1)
Also, \(B = \frac{40}{100}(x)\) ........ (2)
Plugging (2) in (1):
\(90 = \frac{x}{100}(\frac{40}{100})(x)\)
\(x^2 = \frac{90000}{4}\)
\(x = \sqrt{\frac{90000}{4}} = \frac{300}{2} = 150\)
Hence, option B
Re: 90 students represent x percent of the boys at Jones Elementary School
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09 May 2024, 07:45
09 May 2024, 07:45
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