Below is an instruction that describes a task. Write a response that appropriately completes the request in Thai. Please answer in Thai.

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

### Response:
 นาดีนมีหินปูนสีแดง 10 เม็ด
ดังนั้น เธอมีหินปูนทั้งหมด 20 + 10 = 30 เม็ด