Nadine has 20/2 = <<20/2=10>>10 red pebbles.

Thus, she has 20 + 10 = <<20+10=30>>30 pebbles.

# Answer

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Question:
Nadine collected different colored pebbles. She has 20 white pebbles and half as many red pebbles. How many pebbles does she have in all?
Answer:
Let's think step by step.

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Nadine collected different colored pebbles. She has 20 white pebbles and half as many red pebbles. How many pebbles does she have in all?
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