the number of different four digit number that can be formed with the digits 2,3,4,7 and using each only once is
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Answer:
The numbers are:-
Step-by-step explanation:
2347, 2374, 2437, 2473, 2734, 2743
3472, 3427, 3274, 3247, 3742, 3724
4237, 4273, 4372, 4327, 4732, 4723
7432, 7423, 7324, 7342, 7234, 7243
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