lmarcano68 lmarcano68

24-05-2021
Mathematics

contestada

Si en un examen 27 preguntas son correctas el 90%, cuántas preguntas son en total?

Respuesta :

29-05-2021

Respuesta:

30

Explicación paso a paso:

Número total de preguntas = 100%

Número de preguntas correctas = 27

Porcentaje de aciertos = 90%

Por eso,

Si 90% = 27

Luego ; 100% = x

Multiplicar en cruz:

0,9 veces = 27

x = 27 / 0,9

x = 30

Número de preguntas = 30

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