Multivariate Hypergeometric) An urn contains 4 green balls, 3 blue balls, and 2 red balls. In a random sample of 6 balls, find the probability that both red balls and at least 1 blue ball are selected.

Using a scale that has increments that are somewhat large, you could get an error if you reach half of the measuring unit. This is because when you arrive at a measurement greater than half of the measuring unit, you would have to round it up. Therefore, the greatest possible error when measuring to the nearest quarter of an inch is 1/8 inch.