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A boy got 50% of the questions on a test correct. If he had 10 questions correct out of the first 12, and 1/4 of the remaining questions correct, how many questions were on the test ?

Respuesta :

Wallbears
The answer is 28 questions

The total number of questions on the test is 28

If we say x is the number of questions on the test

From the question, we can derive a mathematical equation that states that

0.50x = 10 + 1/4(x-12)

Then, proceeding to solve, we have

0.5x = 10 + (x-12)/4, multiplying all sides by 4, we have

2x = 40 + x-12, collecting like terms, we have

2x - x = 40 - 12

x = 28

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