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Marcus wants to earn an "A" in math for the 4th quarter. His teacher is averaging 4 test grades. His grades on the first three tests are 85, 95, and 88. What grade does he need to earn on his 4th test to end up with an average of 90?

Sagot :

Answer:

87

Step-by-step explanation:

92

85+95+88+92 = 360
360/4 = 90