A set of average city temperatures in August are normally distributed with a mean of 21.25°Cand a standard deviation of 2° C.
What proportion of temperatures are between 19.63° C and 20.53° C?

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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.