I'll give you a question, please answer with step-by-step reasoning process.
Maggie picked 40 apples. Kelsey picked 28 apples. Layla picked some apples, too. The three averaged 30 apples picked. How many did Layla pick?

22
Together, they picked 30 * 3 = 90.

There are 40 + 28 = 68 accounted for.

Then Layla picked 90 - 68 = 22.

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The answer: 22