Medical researchers were interested in measuring the possible loss of vitamin C when wheat soy blend (contains vitamin C) is mixed with other ingredients and cooked. Five samples of food with wheat soy blend were prepared according to a certain recipe. The vitamin C content of the samples was measured before and after cooking. The PAIRED results were:

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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.

I’m not sure what it is i sorry : ((