Refer to Example 4. An urn contains seven red balls, seven white balls, and seven blue balls, and sample of four balls is drawn at random without...

Refer to Example 4.40. An urn contains seven red balls, seven white balls, and seven blue balls, and sample of four balls is drawn at random without replacement.

Compute the probability that all of the balls in the sample are the same color. (Round your answer to four decimal places.