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How many whole numbers from 1 to 1000 contain the digit 7 at least once?

Competition practicePermutations & Combinations
  • A300
  • B271
  • C252
  • D280

Step-by-Step Solution

Count 000–999 without a 7: (this includes 000). So 1–999 without 7 = 728; 1000 has no 7, giving 729 numbers without 7. With a 7: .
Answer: B) 271

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