The price of a gallon of milk follows a normal distribution with a mean of $3.20 and a standard deviation of $0.10. What proportion of the milk vendors have prices that were less than $3.12 per gallon

Step-by-step explanation:

Mean

Standard deviation

Estimated price

Generally the equation for P(x<3.12) is mathematically given by

Since from Z table

Therefore the  proportion of the milk vendors that have prices that were less than $3.12 per gallon is

-6 is the correct option from the above given options