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Tardigrade
Question
Mathematics
2011 is an example of a 4 digit number, exactly 2 digits of which are identical and adjacent. Number of 4 digit numbers with the same property including 2011, is
Q. 2011 is an example of a 4 digit number, exactly 2 digits of which are identical and adjacent. Number of 4 digit numbers with the same property including 2011, is
364
96
Permutations and Combinations
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A
1944
B
2439
C
2521
D
2440
Solution:
Correct answer is (a) 1944