Question

In a school 4/7of thestudents are boys . If there are 210 are girls,find the no. Ofboys in the school

Answer 1

Step-by-step explanation:

Let the number of students be 3x  =  210

∴ Number of Boys = 4x

∴ Total Number of Students = 3x  +  4x  =  7x

∴ Number of Boys + Number of Girls = Total No. of Students.

∴            4x  +  3x  =  7x

∴            4x  +  210  =  7x  ...   [ 3x = 210 = Total No. of Girls ]

∴            210     =  7x  -  4x

∴             3x      =   210

∴              x        =   210 / 3

∴              x        =    70

Total Number of Boys =  4x  =  4 × 70

                                               =   280

∴ Answer :- Total Number of Boys are 280.

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