Question

There are 2 answers for this

Answer 1

Answer:

There were 30 questions on the test so she got 3 questions wrong.

Step-by-step explanation:

Given that:

Correct answers by Emma = 27

Percentage of correct answers = 90%

Let,

x be the total number of questions on test

90% of x = 27

$\frac{90}{100}x=27$

$0.9x=27$

Dividing both sides by 0.9

$\frac{0.9x}{0.9}=\frac{27}{0.9}\\x=30$

There were 30 questions on the test.

Wrong answers = Total questions - Correct answers

Wrong answers = 30-27 = 3

Hence,

There were 30 questions on the test so she got 3 questions wrong.