Question

find the number of 4 digit numbers that can be formed using the digits 3,4,5,7,8 & 9,where the repetition of the digit is allowed​

Answer 1

Step-by-step explanation:

No repetition 

Four digit number 

Starting with 1 

Rest leftover numbers =5 

Number of blanks =3 

Number of digits 

5P3

=5×4×3

=60 

Answer 2

Answer:

ans will be 60

Step-by-step explanation:

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