Total number of four digit odd numbers that can be formed using 0, 1, 2, 3, 5, 7 (using repetition allowed)…

Total number of four digit odd numbers that can be formed using 0, 1, 2, 3, 5, 7 (using repetition allowed) are
  1. 216
  2. 375
  3. 400
  4. 720

Solution

Required number of numbers $=5 \times 6 \times 6 \times 4=36 \times 20=720$

Asked in: JEE Main 2002

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