The total number of students in a school was 660. The ratio between bo – McqOptions

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1.	The total number of students in a school was 660. The ratio between boys and girls was 13 : 9. After some days, 30 girls joined the school and some boys left the school and new ratio between boys and girls became 6 : 5. The number of boys who left the school is :
A.	50
B.	40
C.	30
D.	60
Answer» D. 60

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