а. 57 3. A student s grade on the first of 7 quizzes in Math was 75. However, on each successive quiz her score was 3 more than on the preceding one. What was the average of the seven quizzes? а. 83 4. How many times will a clock strike in 2 days if it strikes only at the b. 117 c. 197 d. 216 b. 83.5 c. 84 d. 85.5 hour and strike once at 1, twice at 2, thrice at three and so on..?

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