Permutations & Combinations
4-Letter Words with Repetition from PQRPQRSTUVP
nta_pyq_2026_jan
Grade None
Question:
The number of 4-letter words, with or without meaning, which can be formed using the letters PQRPQRSTUVP, is _____.
Step-by-Step Solution
Key Concept: Available: P(3), Q(2), R(2), S(1), T(1), U(1), V(1) — 7 distinct letters. Cases: all distinct, one pair + 2 distinct, two pairs, one triple + 1 distinct.
1422.
Correct Answer: 1422