SOLUTION: In Chemistry class, Andrew has earned scores of 64, 69, and 73 on three tests. He must maintain an average of 70 to pass the course. What score must Andrew earn on the final exam t
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Question 678298: In Chemistry class, Andrew has earned scores of 64, 69, and 73 on three tests. He must maintain an average of 70 to pass the course. What score must Andrew earn on the final exam to pass the course?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Average = (Sum of scores)/4
70 = (64+69+73+x)/4
70 = (206+x)/4
70*4 = 206+x
280 = 206+x
280-206 = x
74 = x
x = 74
So he needs at least 74 on the fourth and final test.
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