You need a 50% alcohol solution. on ha d, you bave a 350 ml of a 40% alcohol mixture. how much pure alcohol will you need to add to obtain the desired solution?

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.

Answer you gust need two multiple them and will give you the answer