SOLUTION: The average number of soft drinks sold by a restaurant per day is 120 and a standard deviation of 10, What is the probability that at most 100 soft drinks will be sold tomorrow?
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Question 1159959: The average number of soft drinks sold by a restaurant per day is 120 and a standard deviation of 10, What is the probability that at most 100 soft drinks will be sold tomorrow? Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! This has a z-score of (100-120)/10=-2
probability of z< -2 is 0.0228
The probability of z<-2 is 0.02275, I rounded.
Can also do it by 2nd VARS 2 normalcdf (-6, -2). note, the -6 is just far enough to the left to be effectively infinite. You may use 1e99).
