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  4. Four digit numbers are formed using the digits 1, 2, 3, 4 (repetition is allowed). The number of such four digit numbers divisible by 11 is

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Q. Four digit numbers are formed using the digits 1, 2, 3, 4 (repetition is allowed). The number of such four digit numbers divisible by 11 is

Permutations and Combinations

Solution:

Correct answer is (c) 44

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