in a class the number of boys is more than the number of girls by 12% of the total strength.the ratio of boys is to girls is

Asked by ajayrath7 | 25th May, 2017, 11:31: AM

Expert Answer:

begin mathsize 16px style Let space the space number space of space girls space be space straight x comma space and space the space number space of space boys space space be space straight y.
According space to space the space given space condition comma
straight y equals straight x plus 12 over 100 left parenthesis straight x plus straight y right parenthesis
rightwards double arrow straight y equals fraction numerator 100 straight x plus 12 straight x plus 12 straight y over denominator 100 end fraction
rightwards double arrow 100 straight y equals 100 straight x plus 12 straight x plus 12 straight y
rightwards double arrow 88 straight y equals 112 straight x
rightwards double arrow 88 over 112 equals straight x over straight y
rightwards double arrow straight x over straight y equals 11 over 14
So comma space the space ratio space is space 11 colon 14. end style

Answered by Rebecca Fernandes | 24th Nov, 2017, 12:23: PM