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?
