Question

To pass an examination, a candidate needs $40$% marks. All questions carry equal marks. A candidate just passed by getting $10$ answers correct by attempting $15$ of the total questions. How many questions are there in the examination?

• A. $25$
• B. $30$
• C. $40$
• D. $45$

Answer 1

The correct option is A $25$

Let the number of question in the exam be $x$

Required number to get pass $=\frac{40}{100}\times x$

Candidate just passed by getting $10$ answers correct by attempting $15$ total questions.

Therefore, $10=\frac{40}{100}\times x$

$\Rightarrow x=\frac{10\times 100}{40}$

$\Rightarrow x=25$