Question Number 921 by 112358 last updated on 24/Apr/15
$${How}\:{many}\:{arrays}\:{of}\:{the}\:{letters} \\ $$$${of}\:{the}\:{word}\:{BELMOPAN}\:{are}\: \\ $$$${possible}\:{if}\:{no}\:{two}\:{vowels}\:{come} \\ $$$${together}? \\ $$
How-many-arrays-of-the-letters-of-the-word-BELMOPAN-are-possible-if-no-two-vowels-come-together-