how many different odd numbers of 4 digits can be formed with digits 1 2 3 4 5 6 7 the digits in any number being all different?
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Answer:
1372
Step-by-step explanation:
four digit no.
_ _ _ _
the fourth place can only have 1,3,5,7 so as the number to be odd
with repeating
so there are only four possibilities
7 × 7 × 7 × 4 =1372
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