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31) Each test grade in Sara's science class counts for 1/6 of the final grade. The final exam counts for 1/2. Sara's test scores are 72, 84, and 90. Her final exam score is 90. What is Sara's final grade for the class?

Respuesta :

SamTheman116
Add up all of the first three scores and divide them by 3.
You should get 82.
Then do 82+90 and divide that by 2
You should get 86.
86 is your answer
onyebuchinnaji

Sara's final grade for the class is 86

The given expression:

test scores = 72, 84, 90

final exam score = 90

To find:

  • Sara's final grade for the class

Find the actual test score if the test score score counts for 1/6

[tex]= \frac{72}{6} + \frac{84}{6} + \frac{90}{6} \\\\= 12 + 14 + 15\\\\= 41[/tex]

The total test score = 41

Find the actual final exam score if the test score score counts for 1/2

[tex]= \frac{90}{2} = 45[/tex]

Sara's final grade for the class = test score + final exam score

Sara's final grade for the class = 41 + 45

Sara's final grade for the class = 86

Thus, Sara's final grade for the class is 86

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