How many 4 digit number can be formed using digits 1 to 9 without repetition?
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Answered by
0
Yo mate !!!
Answer :-
1) 1234
2)5678
I think only these numbers or u wanna know more lemme tell u
1) 3456
2) 7890
Etc
Mark as brainliest please !
Answer :-
1) 1234
2)5678
I think only these numbers or u wanna know more lemme tell u
1) 3456
2) 7890
Etc
Mark as brainliest please !
Answered by
0
Only 4 places are avilable for 9 digits.
Therefore for the 1st place we can put any of the nine digit. Thus we have nine options there. In the 2nd place we have 8 options left since 1 is already occupied in the 1st place nd we have to do without repitation. Similarly for 3rd nd 4th places we have 7 and 6 options left respectively. So number of digits that can be formes using all the 9 digits without repitition is 9×8×7×6.
Hope this helps.
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