SOLUTION: In a city, daily sale of petrol at a petrol pump follows normal distribution and its mean and
standard deviation are 33,000 litre and 3000 litre respectively.
(i) Obtain the % of
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Question 1160440: In a city, daily sale of petrol at a petrol pump follows normal distribution and its mean and
standard deviation are 33,000 litre and 3000 litre respectively.
(i) Obtain the % of days of a month during which the daily sales of petrol is less than 30,000
litre.
(ii) During the month of May, how many days are expected so that the sale of petrol is between
32,000 litre to 35,000 litre?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z=(x-mean)/sd
z=(30000-33000)/3000=-1
z<-1 0.1587 of the time or 15.87%
between 32000 and 35000 liters is between -1/3 and +2/3 sd. This is 0.3781 probability and in 31 days would expect 11.72 days or about 12 days.
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