Question Number 101880 by mr W last updated on 05/Jul/20

Find the number of six−digit odd  numbers without repeated digits.

Answered by bemath last updated on 05/Jul/20

5×8×C_4 ^8 ×4!

Commented bymr W last updated on 05/Jul/20

correct, thanks!

Answered by som(math1967) last updated on 05/Jul/20

Odd numbers unitdigit 1  p_5 ^9 − ^8 p_4 =9×8×7×6×5−8×7×6×5  =8×7×6×5(9−1)  =8×7×6×40  ∴total odd numbers=56×240×5  =67200

Commented bysom(math1967) last updated on 05/Jul/20

welcome sir

Commented bymr W last updated on 05/Jul/20

correct, thanks!