JEE MATHEMATICS MCQ: PERMUTATIONS

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The number of different 7 digit numbers that can be written using only the three digits 1,2 and 3 with the condition that the digit 2 occurs twice in each number is

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Correct option: B

{ }^7 {C}_2 2^5

Option B (

{ }^7 {C}_2 2^5

) is correct because it calculates the number of ways to arrange the digits with the given condition.

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