Question 262774
quiz average = 70
exam grades = 54, 66, 76
exam total = 196
exam average = 65.333
Quiz = exam
final = 2*exam
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70 < Q + ex + F
70 < (70 + 65.333 + 2E)/4 
280 < 135.333 + 2E
144.666 < 2E
77.333 < E
you need 78% or better to pass class
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we have
80 < Q + ex + F< 90
80 < (70 + 65.333 + 2E)/4 < 90
320 < 135.333 + 2E < 360
184.666 < 2E < 224.666
92.333 < E < 112.333
you need 93% or better to get a B.