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Elizabeth got these grades on three tests: 72, 80 and 82. She had one more test to take. She wanted an average of 80 for the four tests. What score must she get on the fourth test?

User Peller
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Answer:

she at least needs an 87 for her average to be an 80

Explanation:

87+72+80+82=321

321/4= 80.25

User Maxisam
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