In a class there are 18 boys who are over 160 cm tall. If these boys constitute three-fourths of the boys and the total number of boys is two-third of the number of students in the class, then what is the number of girls in the class?

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Q: 139 (IAS/2000)
In a class there are 18 boys who are over 160 cm tall. If these boys constitute three-fourths of the boys and the total number of boys is two-third of the number of students in the class, then what is the number of girls in the class?
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question_subject: 

Logic/Reasoning

question_exam: 

IAS

stats: 

0,8,4,1,8,2,1

keywords: 

{'students': [0, 1, 1, 1], 'fourths': [0, 1, 0, 0], 'boys': [0, 1, 5, 11], 'girls': [0, 2, 3, 10], 'total number': [0, 0, 3, 0], 'number': [0, 0, 0, 2], 'class': [4, 1, 4, 15], 'third': [2, 1, 3, 6]}