Question 450703
Let {{{x}}} = score the student needs on last exam
{{{ (62 + 73 + 81 + 79 + x) / 5 = 70 }}}
{{{ (62 + 73 + 81 + 79 + x = 350 }}}
{{{ 295 + x = 350 }}}
{{{ x = 55 }}}
The student needs a 55% to average at least 70%