Suppose that prices of a gallon of milk at various stores in one town have a mean of $3.96 with a standard deviation of $0.12. using chebyshev's theorem, what is the minimum percentage of stores that sell a gallon of milk for between $3.72 and $4.20? round your answer to one decimal place.

25%

Step-by-step explanation:

Given that prices of a gallon of milk at various stores in one town have a mean of $3.96 with a standard deviation of $0.12.

When sales lie between 3.72 and 4.20 dollars we get

we have 3.72 = 3.96-2 (0.12) and

              4.20 = 3.96+2(0.12)

Hence simply we can write

i.e. 25% is the minimum percentage of stores that sell a gallon of milk for between $3.72 and $4.20

add an !

step-by-step explanation:

b, i believe, but not sure.