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SSC CGL Tier 2 Exam 25 Oct 2015 Paper 1
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© examsnet.com
Question : 50
Total: 100
In a school there were 1554 students and the ratio of the number of the boys and girls was 4 : 3. After a few days, 30 girls joined the school but a few boys left; as a result the ratio of the boys and girls became 7 : 6. The number of boys who left the school is
76
74
84
86
Validate
Solution:
(1) In the school,
Boys
⇒
4
7
×
1554
=
888
Girls
⇒
3
7
×
1554
=
666
After 30 days,
Girls = 666 + 30 = 696
If x boys leave the school,
then,
According to the question,
888
−
x
696
=
7
6
⇒
888
−
x
116
=
7
⇒
888
−
x
=
116
×
7
=
812
⇒
x
=
888
−
812
=
76
© examsnet.com
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