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The average monthly gasoline purchase for a family with 2 cars…

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The average monthly gasoline purchase...
The average monthly gasoline purchase for a family with 2 cars is 90 gallons. This statistic has a normal distribution with a standard deviation of 10 gallons. A family is chosen at random.
(a) Find the probability that the family’s monthly gaoline purchases will be between 88 and 98 gallons.
(b) Find the probability that the family’s monthly gasoline purchases will be less than 100 gallons.
(c) Find the probability that the family’s monthly gasoline purchases will be more than 78 gallons
Submitted: 8 years ago.Category: Math Homework
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Answered in 22 minutes by:
6/16/2010
Math Tutor or Teacher: Stevewh, Bachelor's Degree replied 8 years ago
Stevewh
Stevewh, Bachelor's Degree
Category: Math Homework
Satisfied Customers: 7,610
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Hi,

I can do it but i see that you are not accepting the previous answers

Steve
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