Respuesta :
The answer: 16 questions.
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Note:
80% * 20 = 0.80 * 20 = 0.8 * 20 = 16.0 = 16 .
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_______________________________
Note:
80% * 20 = 0.80 * 20 = 0.8 * 20 = 16.0 = 16 .
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