JEE MAIN - Mathematics (2002 - No. 33)
Total number of four digit odd numbers that can be formed using 0, 1, 2, 3, 5, 7 (using repetition allowed) are :
216
375
400
720
Giải thích
$$\therefore$$ Total no of ways = 5$$ \times $$6$$ \times $$6$$ \times $$$${}^4{C_1}$$ = 720