Question 937743

{{{(71+61+90+ 60+x)/5=72}}}

{{{(282+x)/5=72}}}

{{{282+x=72*5}}}

{{{282+x=360}}}

{{{x=360-282}}}

{{{x=78}}}

  she need to make {{{78}}} on her next test so that her average is {{{72}}}