contestada

Carly missed 22.5% of the questions on
the last test, and the rest of the questions
were correct. She had 31 questions
correct. How many questions were on the
test?

Respuesta :

Answer:

40 questions

[tex]correct \: questions = (100 - 22.5)\% \\ = 77.5\% \\ let \: total \: questions \: be \: x \\ = > 77.5\% \times x = 31 \\ \frac{77.5}{100} \times x = 31 \\ 77.5x = 3100 \\ x = 40 \\ = 40 \: questions[/tex]

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