Answer: Choice B) 1/4
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Explanation:
Imagine that Rhianna has 4 blocks. If we mark 3 of those blocks with a different color, then this represents 3/4 of all the blocks.
If we focus on those 3 blocks, and take one-third of them, then we'll pick on 1 block. This is out of the original 4 total. So that's why the answer is 1/4
An alternative to see this is to multiply 3/4 and 1/3
(3/4)*(1/3) = (3*1)/(4*3) = 3/12 = 1/4
Getting the same answer as before
