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Please help me out!

On a unit test in statistics class, the teacher determines that the mean test grade was 77.5 with a standard deviation of 5.2. What is the test grade, rounded to the nearest whole number, with a z-score of 2.4?

A.65

B.83

C.90

D.95

Respuesta :

Answer is C.

90-77.5= 12.5

12.5/5.2= 2.40 z-score

90 is the missing answer

Answer:

C: 90

Step-by-step explanation:

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