Question 517307
What should your next score be?
Let the next score = {{{ x }}}
The definition of average is:
( sum of the scores ) / ( number of tests )
average = {{{ ( 85 + 78 + 90 + 86 + x ) / 5 }}}
{{{ 89 = ( 339 + x ) / 5 }}}
{{{ 339 + x = 5*89 }}}
{{{ x = 445 - 339 }}}
{{{ x = 106 }}}
You need a score of 106