Total number of four digit odd numbers that can be formed using 0, 1, 2, 3, 5, 7 are
Total number of four digit odd numbers that can be formed using 0, 1, 2, 3, 5, 7 are
(a) 216
(b) 375
(c) 400
(d) 720.
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(d) : Odd numbers are 1, 3, 5, 7
We have to fill up four places like TH H T U (Case: If repetition is allowed)
5C1 62 4C1 = 5 × 62 × 4
= 5 × 36 × 4
= 720
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