Answer :
She must have a score greater than 69 in her final tests
Let the required score be "x"
What is Mean?
The mean of the data is the ratio of the sum to the total sample
Mean = 80+76+85+85+x/5
80+76+85+85+2x/5 > 79
326+x/5 > 79
326 + x > 395
x > 395 - 326
x > 69
This shows that she must have a score greater than 69 in her final tests
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