Multiple choice In how many different ways the letters of the word 'HAPPINESS' can be arranged? 181440 362880 90720 30240 Reveal answer Fill a bubble to check yourself C Correct answer Explanation The word HAPPINESS has 9 letters with P appearing twice and S appearing twice. Using the formula for permutations of multiset: 9!/(2! × 2!) = 362880/4 = 90720 distinct arrangements.