torical data on the sales of gasoline for 3650 days (since the beginning of operation) of a gas station were found to have mean and standard deviation of 420.9 gallons and 29.5 gallons, respectively. If the distribution of values is bell-shaped, approximately how many of the daily sales (a) falls in the interval 361.9 – 479.9 gallons? (b) exceeds 509.4 gallons? (c) falls below 391.4 gallons?  thanks

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Chapter1: Combinatorial Analysis
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Historical data on the sales of gasoline for 3650 days (since the beginning of operation)
of a gas station were found to have mean and standard deviation of 420.9 gallons and
29.5 gallons, respectively. If the distribution of values is bell-shaped, approximately how
many of the daily sales (a) falls in the interval 361.9 – 479.9 gallons? (b) exceeds 509.4
gallons? (c) falls below 391.4 gallons? 

thanks

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