Question 829003
To average take the scores, add them, and divide by the number of scores.
Let S be the score he needs to get on the next test.
{{{(73+71+97+S)/4>=85}}}
{{{(241+S)/4>=85}}}
{{{(241+S)>=340}}}
{{{highlight(S>=99)}}}
Not impossible but it sounds like a tall order!