WBJEE · Maths · Permutation Combination
The number of all numbers having 5 digits, with distinct digits is
- A 99999
- B \(9 \times{ }^{9} P_{4}\)
- C \({ }^{10} P_{5}\)
- D \({ }^{9} P_{4}\)
Answer & Solution
Correct Answer
(B) \(9 \times{ }^{9} P_{4}\)
Step-by-step Solution
Detailed explanation
Total number of 5-digit numbers having all the digits distinct \(={ }^{10} \mathrm{P}_{5}-{ }^{9} \mathrm{P}_{4}\)…
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