Sorrel has 54 beads, and 16 of them are red. Of the remaining beads, half are yellow and half are green. How many yellow beads does she have?

First subtract the 16 red beads from 54: 54 − 16 = 38 beads remain. Half of those are yellow, so 38 ÷ 2 = 19 yellow beads; the correct choice is 19 beads.

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