Question

were students attempting the quiz? change the voice​

Answer 1

Answer:

was the quiz attempted by the students?

Answer 2

$\huge{\fbox{\red{\fbox{\blue{\sf{Voice\: Change}}}}}}$

Was the quiz being attempted by the students ?

$\huge{\underline{\underline{\red{\sf{Explanation}}}}}$

Here, only a single quiz is being taken so were was changed to was. Since, the students were attempting the quiz therefore the sentence is in present tence hence the voice changed sentence is also in present tence.