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If repetition of numbers is not allowed then how many numbers of five digits can be formed by using 1,2,3,4,5...........

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If repetition of numbers is not allowed then how many numbers of five digits can be formed by using 1,2,3,4,5.
If 4 is necessarily taken at hundred's place and 2 is not allowed at unit's place

posted Jan 22, 2016 by Amarvansh

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2 Answers

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Ans :18 numbers of five digits can be formed.
01) 12435
02) 12453
03) 13425
04) 15423

#

05) 21435
06) 21453
07) 23415
08) 23451
09) 25413
10) 25431

#

11) 31425
12) 32415
13) 32451
14) 35421

#

15) 51423
16) 52413
17) 52431
18) 53421

answer Jan 22, 2016 by Jaikumar Bhatia
0 votes

answer=15120

answer Jan 31, 2016 by Mahendra Kumar Patel
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