Choose 1 answer:

(Choice C)C44%

I understand how to get to the correct answer, but my question is: why can I not use the rule of addition to just add probability that the first child has blue eyes (1/4) and the probability the second one does...so, 1/4 + 1/4 = 50%

i.e.. For mutually exclusive events X and Y, the probability (P) that one will occur (X or Y) is P(X)+P(Y)