In a school ³/₇ of the students are girls. If there are 240 boys , find the number of girls
in the school.
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Number of girls=Every third student in seven. I.e. 3/7
:.Number of boys=Total-Girls=7/7-3/7=4/7
Now if 4/7 of x=240
.:x=240/4×7=60×7=420
Now 3/7 of 420 =3/7×420=3×60=180
:.Number of boys=Total-Girls=7/7-3/7=4/7
Now if 4/7 of x=240
.:x=240/4×7=60×7=420
Now 3/7 of 420 =3/7×420=3×60=180
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