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How many 3-digit numbers can be formed f...

How many 3-digit numbers can be formed from the digits 1, 2, 3, 4 and 5 assuming that repetition of the digits is not allowed?

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The correct Answer is:
So, the number of ways in which the selection of three digits can be made=`5xx5xx5` = 125 ways.
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OMEGA PUBLICATION-PERMUTATIONS AND COMBINATIONS-Multiple Choice Questions (MCQs)
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  6. If \ ^(43)C(r-6)=\ ^(43)C(3r+1)\ then the value of r is

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  10. There are n points in a plane of which p points are collinear. How man...

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  11. The number of diagonals that can be drawn by joining the vertices of a...

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  12. A polygon has 44 diagonals. The number of its sides is

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  13. The value of ""^8P7 is

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  14. P(n, 6) = 3 P(n, 5), then n is equal to

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  15. If 2 ""^nP3 = ""^(n+1)P3, then n is equal to

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  16. The value of ""^nPr, and ""^nCr will be equal when

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  17. (C(9,7))/(C(9,5))=?

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  18. The numbers of diagonals in an n sided figure is equal to

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