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# An urn contains 1000 balls, fifty are green and 950 are white. One ball is chosen from the urn 1000 times.

An urn contains 1000 balls, fifty are green and 950 are white. One ball is chosen from the urn 1000 times. Use the normal approximation method to find the probability that between 60 and 70 of the balls,inclusive, are green.