in a school , number of boysare are 180 more than the girls. if there are 45% girls in the school , find the number of girls in the school.
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number of girl's = 810
Step-by-step explanation:
let number of girls be x
number of boys = x+180
total number of students = 2x+180
given that x is 45% of (2x+180)
=> (45/100) (2x+180) = x
=> 45(2x) + 45(180) = 100x
=> 100x - 90x = 45(180)
=> 10x = 8100
=> x= 810
so number of girls = 180
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