Using 2, 2, 3, 3, 3 as digits, how many distinct numbers greater than 30000 can be formed?
Answer & explanation
Answer: (b) 6
A five-digit number from these digits exceeds 30000 only if it starts with 3. The remaining digits 2, 2, 3, 3 can be arranged in 4!/(2! × 2!) = 6 distinct ways.
- A number made from 2, 2, 3, 3, 3 is greater than 30000 only if its first digit is 3.
- The remaining digits 2, 2, 3, 3 can be arranged in 4! ÷ (2! × 2!) = 24 ÷ 4 = 6 ways.
- So 6 distinct numbers are greater than 30000.
- Check: 32233, 32323, 32332, 33223, 33232, 33322.
Remember · Arrangements with repeated items = n! ÷ (product of the factorials of the repeat counts).
Question and answer: UPSC's official GS Paper II (2021, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 30 Sept 2026 (how we verify). ·