Question 984434
{{{P(RRRRR)=(9/27)(8/26)(7/25)(6/24)(5/23)=7/4885}}}
Since there are also nine of the other color balls, the probabilities of all white and all blue are the same. 
To get the probability of the same color, add the individual color probabilities.
{{{P=P(RRRRR)+P(WWWWW)+P(BBBBB)}}}
{{{P=3(7/4885)}}}
{{{P=21/4885}}}