Question 826594


if  the number of boys {{{b}}} to the number of girls {{{g}}} is {{{5:6}}}, then we have

{{{b : g=5:6}}} 

if we have {{{b=20}}}, then we can calculate the number of girls

{{{20 : g=5:6}}} 

{{{5g=20*6}}}


{{{g=20*6/5}}}

{{{g=cross(20)4*6/cross(5)1}}}

{{{g=4*6}}}

{{{g=24}}}

so, there is {{{24}}} girls in the class

all together, {{{20+24=44}}} pupils are in the class