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# ENTS 2015 99. The probability that a senior HS student in NJ is enrolled in an AP class is 0.32. Sarah randomly selects 6

## ENTS 2015 99. The probability that a senior HS student in NJ is enrolled in an AP class is 0.32. Sarah randomly selects 6 seniors from NJ. Let X = number of seniors that are enrolled in AP classes. What is the P(X = 2)? A. 0.3284 B. 0.7064 C. 0.2176 D. 0.5376 E. 0.1024 Q10. The probability that a senior HS student in NJ is enrolled in an AP class is 0.3% selects 6 seniors from NJ. Let X = number of seniors that are enrolled in AP classes. probability that X is at least 3? A. 0.1480 B. 0.7064 C. 0.3176 D. 0.5526 E 0.2936 andomly he Q11. The probability that a senior HS student in NJ is enrolled in an AP class is 0.32. Sarah randomly selects 6 seniors from NJ. Let X = number of seniors that are enrolled in AP classes. What is the probability that X is at most 5? table 15 A. 0.9989 la 14 ace graph S G clear TU H e M B. 0.0137 C. 0.8546 D. 0.7523 E. 0.1143 Q12. The probability that a senior HS student in NJ is enrolled in an AP class is 0.32. Sarah randomly selects 6 seniors from NJ. Let X = number of seniors that are enrolled in AP classes. What is the mean and what is the standard deviation of X? A. mean = 1.92, SD = 1.143 B. mean 1.92, SD = 1.306 C. mean 1.92, SD = 0.876 D. mean = 2.09, SD = 1.109 E. mean = 2.09, SD = 0.911 R Q W V X 0 1 mem" P(X) Q13. X = number of pencils used in math class per student 3 2 0.13 0.22 0.34 + entry solve enter Why the 4 5 0.15 0.12 0.04 What is the mean number of math pencils used in math class by the typical student? A. 2.03 B. 1.31 C. 3.02 D. 1.97 SD E. 4.15

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