Find the number of numbers less than 2000 that can be formed using the digits 1,2,3,4 if repetition is allowed.
Question from Permutations and Combinations
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Answered by
11
make 4 cases
case 1 , single digit no=4 nos
case 2 , 2 digit no=16nos
case 3, 3 digit no=64nos
case 4 ,4 digit no=64nos
total 148 nos.
Answered by
4
for this question you must be knowing basic principle of and/or
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prafulmittal12:
bro its not written that u hav to make 4 digi no so their will be 4 cases and it will be 4*4*4 .
how can i delete a post
dont know brother.
ok
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