Elsa has taken two exams in Mathematics in Modern World. She got 80 on her first exam, for which the standard deviation was 7 and the mean of all scores was 75. She scored 65 on the second exam for which the mean of all scores was 40 and the standard deviation was 10. _8. What is Elsa's z-score on her first exam? C. 0.7 D. 0.6 A. 0.5 В. О.4 9. What is Elsa's z-score on her second exam? C. 2.0 D. 2.5 A. 0.5 В. 1.0 _10. In comparison to the other students, where did Elsa do better? C. Both exams D. Connot be solved A. First Exam B. Second Exam

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