Question

how many six digit number can be formed using all the digits 1,2,3,0,7,9 ?​

Answer 1

Answer:

973210 or 012379 is the answer

Answer 2

Correct option is

C

726

Given that there are 3 numbers 1,2,3 using which we need to form 6 digit numbers so that at least one digit is different.

At least one digit is different = Total − No digit is different.

⇒ Total possible numbers =3×3×3×3×3×3=3

6

=729

⇒ Numbers in which no digit is different =

3

C

1

=3

(All 1, All 2, All 3)

⇒ Required =729−3=726.

Hence, the answer is 726.