Answer:
192
Explanation:
550 - 10% = 495
495 - 10% = 445
445 - 10% = 400
400 - 10% = 360
360 - 10% = 324
324 - 10% = 292
292 - 10% = 263
263 - 10% = 237
237 - 10% = 213
213 - 10% = 192
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