Statistics - Permutations and combinations
16. In the above problem, if the first digit cannot be 0, then
- Option : B
- Explanation :
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- Option : C
- Explanation :
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- Option : C
- Explanation : Each letter can be printed in twenty-six different ways, the first digit in nine ways and each of the other two digits in ten ways. Hence 26 x 26 x 9 x 10 x 10 = 608400 different plates can be printed.
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Value of n will be
- Option : D
- Explanation : Since is product of consecutive positive integers
Hencenpr = 3024 = 9 x 8 x 7 x 6
Hence,        n = 9
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