Question 834998
There is indeed more than one possible answer. The ratio means that for every {{{3}}} boys in the class, there are {{{2}}} girls. 

Let {{{b}}} be the number of {{{boys}}} in the class, {{{g}}} the number of {{{girls}}}. 

The ratio tells us that {{{b:g=3:2}}}, than {{{g=(2/3)b}}}. 

Now, observe that both {{{b}}} and {{{g}}} must be{{{non-negative}}} or {{{ 0 }}{} {{{integers}} ( it really doesn't make sense for either of them to be {{{negative}}} or {{{ 0 }}}). 

So, what number {{{b}}} could be any positive integer  in order for {{{g}}} to make sense? It will be any number that is divisible by three because it doesn't make sense if you get a decimal number as a result for {{{g}}}.