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Using 2, 2, 3, 3, 3 as digits, how many distinct numbers greater than 30000 can be formed ?
1. 3
2. 6
3. 9
4. 12

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Correct Answer - Option 2 : 6

For numbers greater than 30000, 2 will not be placed as the first digit. So there are 4 places to fill with 2, 2, 3, 3.

Distinct numbers greater than 30000 formed = \(\frac{4!}{2!\times 2!}\)

\(\frac{24}{2\times 2}\) = 6

Hence, option 2 is correct.

The number of ways of arranging n objects, of which p of one type are alike, q of a second type are alike, r of a third type are alike, is   \(\frac{n!}{p!q!r!}\)

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