SOLUTION: Paul earned scores of 76,78, and 90 on his first three science tests. What score does he need on his fourth test to earn a mean score of 82?

Question 606643: Paul earned scores of 76,78, and 90 on his first three science tests. What score does he need on his fourth test to earn a mean score of 82?
Answer by htmentor(1343) (Show Source): You can put this solution on YOUR website!
Paul earned scores of 76,78, and 90 on his first three science tests. What score does he need on his fourth test to earn a mean score of 82?
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The mean score = 82 = (76+78+90+s)/4, where s=the score on the 4th exam
Solve for s:
82*4 = 244 + s
s = 328 - 244 = 84
Ans: 84
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