Find the number of numbers less than 2000 that can be formed using the digits 1,2,3,4 if repetition is allowed.
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37 numbers can be formed using digits 1,2,3,4 less than 2000, if repetition is allowed.
1111, 1222, 1333, 1444, 1223, 1224, 1332, 1334, 1443, 1442, 1441, 1331, 1221, 1231, 1222, 1233, 1234, 1241, 1242, 1243, 1244, 1321, 1322, 1323, 1324, 1341, 1342, 1343, 1344, 1421, 1422, 1423, 1422, 1431, 1432, 1433, 1434.
1111, 1222, 1333, 1444, 1223, 1224, 1332, 1334, 1443, 1442, 1441, 1331, 1221, 1231, 1222, 1233, 1234, 1241, 1242, 1243, 1244, 1321, 1322, 1323, 1324, 1341, 1342, 1343, 1344, 1421, 1422, 1423, 1422, 1431, 1432, 1433, 1434.
Vinnaitsme777:
Ohh
This is not the right answer
Then? What woukd be right one?
This question is of the chapter permutations and combinations
would**
God knows!!!
okay!
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