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shopkeeper decides to get rid of small change by rounding all payments at the check-out to the nearest 10 cents.If the amount ends in 5 cents,he...

shopkeeper decides to get rid of small change by rounding all payments at the check-out to the nearest 10 cents.If the amount ends in 5 cents,he gives the customer the benefit.On one day he serves 800 customers.Assuming that the number of 'odd cents' are randomly distributed.find the probability that on that day he will lose more than 5 dollars as a result of his policy.

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