Question: Maggie picked 40 apples. Kelsey picked 28 apples. Layla picked some apples, too. The three averaged 30 apples picked. How many did Layla pick? Think carefully first, then make a decision:
Together, they picked 30 * 3 = 90. There are 40 + 28 = 68 accounted for. Then Layla picked 90 - 68 = 22. So the answer is 22.