Question 682009
Let {{{ x }}} = points she must score in next game
{{{ ( 21 + 24 + 15 + 21 + x ) / 5 = 20 }}}
{{{ ( 81 + x ) / 5 = 20 }}}
{{{ 81 + x = 100 }}}
{{{ x = 100 - 81 }}}
{{{ x = 19 }}}
Beth must score at least 19 to average 20 for 5 games