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!