How many seven digit numbers can be formed using only three digits 4,
7, 9; the digit 7 occurring exactly twice in each number.
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0
Answer:
do you have been so long for the way it to get a good time I see you happy and the way it was in the world and the world to go to the way they are not a bad thing is a bad day of the year I was in my head to toe nails done it
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1
Answer:
21 is the answer. pls mark my answer as brilliant
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