A luggage lock, like the one shown above, has a 3-digit combination set with 3 dials, each of which has 10 settings (0-9),
a) What is the probability of dialing the correct combinationin one try by chance?
b) What is the multiplicity of the macrostate of the lock inwhich two (and only two) of the dials are set to the same value?
c) What is the multiplicity.