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Dee-M-See | 23:23 Wed 17th Oct 2007 | Quizzes & Puzzles
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A schoolboy had to take eight exams for the first seven exams he averaged 67%
what percentage would he have to get in the eighth exam to average 70% for all eight
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91 per cent.
91%

7x67=469
8x70=560, so 91%
Agree 91% :

(8 x 70 = 560) - (7 x 67 = 469) = 91

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