Answer:
see below
Explanation:
When the letters are replaced and mixed between draws, the draws are independent. In that case, the probability of a sequence is the product of the probabilities of the individual letters in the sequence.
The individual probabilities are ...
D - 1/4
E - 2/4
R - 1/4
__
So, the probability for a sequence like DD is ...
p(D)·p(D) = (1/4)(1/4) = 1/16
Of course, to convert to a percentage, multiply by 100%:
1/16 × 100% = 6.25%
The attachment shows the rest of them.