9) In a country, the probability of a letter posted by Pos Laju' will reach its destination within 24 hours is 0.2. Assume that 200 letters are posted by Pos Laju'. By using normal approximation find the probability that more than 50 letters reach its destination within 24 hours.

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Q: The time (in minutes) between arrivals of customers to a post office is to be modelled by the…

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