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2015-11-09T11:10:34+05:30

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Total number of girls and boys=80. Ratio of number of girls to boys=6:2. Girls=6x and boys=2x. 6x+2x=80. 8x=80. x =80/8=10. Girls=6x =60. Hope this helps you
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2015-11-09T12:34:33+05:30

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Solution :-

Total No .of boys & girls = 80

Ratio of boys and girls   = 6 : 2

Here is the solution ,

∴ No . of boys and girls in ratio = 6 a + 2 b = 80 
  
                                              8 a = 80
           
                                              a =  \frac{80}{8}
                
                                              a = 10

No . of boys = 2 b = 2 × 10 = 20 

∴ No . of girls  = 6 a = 6 × 10 = 60

Total .No . of students = 80 

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