Question 1018041
{{{ ( .6*10 + .15*40 ) / ( 10 + 40 ) }}}
{{{ ( 6 + 6 ) / 50 = 12/50 }}}
{{{ 12/50 = 24/100 }}}
The % concentration is:
{{{ ( 24/100 )*100 = 24 }}}
24%