10 (6 pts). Six yellow balls numbered 1, 2, 3, 4, 5, and 6 a…

10 (6 pts). Six yellow balls numbered 1, 2, 3, 4, 5, and 6 and five blue balls numbered 1, 2, 3, 4, and 5 are placed in an urn. If one ball is chosen at random (a) what is the probability that it is numbered 5 or 6? (b) what is the probability that it is numbered 2, or it is yellow?   11 (6 pts). How many five-letter “words” can be formed from a standard 26-letter alphabet (a) if repetition is allowed? (b) if repetition is not allowed?   12 (6 pts). How many passwords have the form of six symbols that begin with three letters followed by three digits (a) if repetition is allowed? (b) if repetition is not allowed? (Note: The letters are from a standard 26-letter alphabet and the digits are from 0-9.)