Didi has become the fastest growing energy drink in the u. s. the average retail price is $10.00/case. the known std. dev. of price is $4.00/case. the owner of a local supermarket sells and average of 250 cases per month; with a known standard deviation of 50 cases. what is the probability of choosing a case of didi at random with a price greater than $11? a. 0.3867 b. 0.4013 c. 0.8867 d. 0.3101 e. 0.5987