In a certain school, the number of students who study : PS Archive
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# In a certain school, the number of students who study

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In a certain school, the number of students who study [#permalink]

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04 Aug 2006, 22:44
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In a certain school, the number of students who study biology is 26 and the number of boys in the shcool is 18. If the number of girls in the school is twice the number of students in the school who are not studying biology, what is the total number of students?

A. 30
B. 34
C. 38
D. 40
E. 45
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04 Aug 2006, 23:46
Biology-26
Boys-18
Girls=2*(T-26)
Total=B+G
T=18+2*(T-26)
T=34
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05 Aug 2006, 00:37
Let x = total

Boys = 18 then girls = x-18

Biology = 26
Not biology = x-26

As given x-18 = 2(x-26)
x = 34
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05 Aug 2006, 00:37
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