csat-suneung 2005 Q30

csat-suneung · South-Korea · csat__math-humanities 4 marks Combinations & Selection Counting Arrangements with Run or Pattern Constraints

When arranging $1, 2, 2, 4, 5, 5$ in a line to form a six-digit natural number, find the number of natural numbers greater than 300000. [4 points]

When arranging $1, 2, 2, 4, 5, 5$ in a line to form a six-digit natural number, find the number of natural numbers greater than 300000. [4 points]