Abookstore had 160 copies of a magazine. yesterday it sold 78 of them. how many copies were sold yesterday?

I think its 78 because if you have sold 78 yesterday then you sold 78 yesterday.

hope this helps

Ihad to look for the options and here is the answer:
based on the given situation above, i can say that the sample that would give jared the most accurate test results is a sample consisting of every 20th lightbulb. this answer is based on the actual options of this question.