tyrece's quarter grade in Science is calculated by finding his mean test score for that quarter. so far this quarter, Tyrece has taken three tests and scored 68,83, and 74. He wants to earn an 80 for the quarter and has his last test on Friday. What grade does Tyrece need to earn on his last test so that he will have an 80 for the quarter?

Question

anonymous · Answer

The mean is calculated by adding up all the scores and dividing by the amount of scores.  From that are you able to answer the question?

anonymous · Answer

80 = (68 + 83 + 74 + x)/4

solve for x