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Bunuel
A special documentary show was attended by 240 students, who were either from class IV or from class V. Among all the students, the number of girls were 3 times the number of boys. Also, the number of students from class IV was twice the number of students from class V. If 7/16th of the students of class V were boys, then how many girls were there who were not from class V?

A. 25
B. 35
C. 45
D. 105
E. 135
Solution:

  • According to the question:
Attachment:
documentry.png
documentry.png [ 4.14 KiB | Viewed 1336 times ]
  • Number of girls are 3 times the number of boys means:
Attachment:
documentry2.png
documentry2.png [ 3.9 KiB | Viewed 1338 times ]
  • Number of students from class IV are twice the number of students from class V means:
Attachment:
documentry3.png
documentry3.png [ 4.36 KiB | Viewed 1318 times ]
  • 7/16th of the students of class V were boys means:
Attachment:
documentry4.png
documentry4.png [ 5.73 KiB | Viewed 1321 times ]

  • Thus, girls from class IV \(= 180-45=135\)

Hence the right answer is Option E
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