At a school,
161
students play at least one sport. this is
70%
of the students at the school. how many students are at the school?

You would do a proportion.
161/x times 70/100 which is.. 230. Hopefully this well help you.

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.