A) 6
B) 12
C) 24
D) 30
Correct Answer: B
Solution :
Numbers which are divisible by 5 have ?5? fixed in extreme right place| 3 Digit Numbers | 4 Digit Numbers | |||||
| H | T | U | Th | H | T | U |
| × | × | 5 | × | × | × | 5 |
| \[^{3}{{P}_{2}}\] ways | \[^{3}{{P}_{3}}\] ways | |||||
| = \[\frac{3!}{1!}\] = \[\,3\times 2\] | = \[\frac{3!}{0!}\] = \[3\times 2\] | |||||
| \[\Rightarrow \] Total ways = 12. | ||||||
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