Question

how many numbers lying between 100 and 1000 can be formed using the digits 1,4,5,6,7,0 and repetition is allowed
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Answer 1

ANSWER:

Solution :-

number lying between 100 and 1000

formed by 3 digits.

and every digit have 5 option (1,2,3,4,5)

to select a number

But repetion is not allowed

so number = 5P3

=(5−3)!5!

=5!÷2!

=60m.

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Answer 2

Answer:

Numbers can be formed are 5!*6!*6!*6!*6!*6!