Question 61
In how many ways can the letters $A$, $B$, $C$, $D$, $E$, $F$, $G$, $H$, $I$ be arranged so that all of the vowels and all of the consonants are ordered alphabetically?
MathNet 2018-part-02 — 181 problems (EN–VI) Question 61
Math Olympiad Vault · MathNet 2018-part-02 — 181 problems (EN–VI)