JEE MAIN - Mathematics (2023 - 30th January Evening Shift - No. 15)
The number of seven digits odd numbers, that can
be formed using all the
seven digits 1, 2, 2, 2, 3, 3, 5 is ____________.
seven digits 1, 2, 2, 2, 3, 3, 5 is ____________.
Answer
240
Explanation
$$.......1 \to {{6!} \over {2!3!}} = 60$$
$$.......3 \to {{6!} \over {3!}} = 120$$
$$.......5 \to {{6!} \over {3!2!}} = 60$$
Total = 240
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