Final answer:
To find the fraction of Lorna's room painted pink or white, add the fractions representing the amount of the wall painted pink and white: 1/4 + 1/4 = 2/4 = 1/2.
Step-by-step explanation:
To find how much of her room is painted pink or white, we need to add the fractions that represent the amount of the wall painted pink and white. In this case, Lorna painted 1/4 of the wall pink and 1/4 of the wall white. Adding these two fractions gives us:
1/4 + 1/4 = 2/4 = 1/2
Therefore, 1/2 of her room is painted pink or white, so the answer is B. (1/2).