The ratio of boys and girls in a school is to 7. If there are 150 boys and girls, how many boys are there?

The ratio of boys and girls in a school is to 7. If there are 150 boys and girls, how many boys are there? Correct Answer 45

ধরি, ছাত্রের সংখ্যা = 3x ও ছাত্রীর সংখ্যা = 7x<math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>&#x2234;</mo></math> 3x + 7x = 150<math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>&#x21D2;</mo></math> 10x = 150<math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>&#x21D2;</mo></math> x = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>150</mn><mn>10</mn></mfrac></math><math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>&#x21D2;</mo></math> x = 15 <math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>&#x2234;</mo></math> ছাত্রের সংখ্যা = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfenced><mrow><mn>3</mn><mo>&#xD7;</mo><mn>15</mn></mrow></mfenced></math> জন = 45 জন।
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