The annual family expenditures of 421 families in the main city is normally distribution with a mean (A.M) of RS.800000 and standard deviations of Rs.75000. If a family of the city is selected normally,  (I) what is the probability that the annual expenditure of a family is greater than Rs.600000.  (ii) what is the probability that the annual expenditure of a family is in between Rs.650000 and Rs.840000.

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