## Elementary Statistics (12th Edition)

$2,095,681,645,538$
By using the fundamental counting rule we can get the number of possibilities: 1 character: $26$. 2 characters: $26\times36=936$. 3 characters: $26\times36\times36=33,936$. 4 characters: $26\times36^{3}=1,213,056$. 5 characters: $26\times36^{4}=43,670,016$. 6 characters: $26\times36^{5}=1,572,120,576$. 7 characters: $26\times36^{6}=5,659,634,0736$. 8 characters: $26\times36^{7}=2,037,468,266,496$ Total:$2,095,681,645,538$.