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How many different 4-digit numbers can b...

How many different 4-digit numbers can be formed from the digits 2,3,4 and 5 if each digits is used only once in as number ? Further, how many of these numbers i. end in a 4? ii.end in a 3? iii. End in a 3 or 6?

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The correct Answer is:
24 (i) 6 (ii) 6 (iii) 12
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MODERN PUBLICATION-PERMUTATIONS AND COMBINATIONS -EXERCISE 7 (d) Long Answer Type Questions - I
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