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Umnica [9.8K]
3 years ago
8

Students at XYZ Senior High School took a practice SAT. Their scores were normally distributed with a mean score of μ = 675 and

a standard deviation of σ = 25 . If 250 students took the test, how many of them scored 700 or better?
A. 200
B. 210
C. 238
D. 170
SAT
1 answer:
aleksklad [387]3 years ago
8 0

Answer:

210

Explanation:

with the 68-90-99.7 rule about 84% of students would get a 700 or better because its one std dev away from the mean so 50+34=84%

.84*250=210

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