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Keith has earned a 75%, an 86%, and an 83% on his tests so far this grading period. He wants to have an 80% average. If each test is included equally in his average, what is the lowest score that Keith could earn on the next test and keep at least an 80% average?


69%

72%

76%

80%

Respuesta :

Answer:

76%

Step-by-step explanation:

For the definition of mean we can write this equation

(75 + 86 + 83 + x)/4 = 80

(244 + x)/4 = 80

244 + x = 320

x =76 %

emily968
Hope this help x = 76% have a nice day