AP EAMCET · Maths · Permutation Combination
The number of positive integers less than 10000 which contain the digit 5 atleast once is
- A \(3168\)
- B \(3420\)
- C \(3439\)
- D \(5832\)
Answer & Solution
Correct Answer
(C) \(3439\)
Step-by-step Solution
Detailed explanation
Total positive integers less than 10000: \(9999\) Number of integers from 0 to 9999 that do NOT contain the digit 5: \(9 \times 9 \times 9 \times 9 = 9^4 = 6561\) Number of positive integers from 1 to 9999 that do NOT contain the digit 5 (excluding 0): \(6561 - 1 = 6560\) Number…
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