Select two numbers, n and k, each not higher than 12. Number n should be greater than k, ngt;k, like n=10 and k=3, or n=8 and k=2.

Select two numbers, n and k, each not higher than 12.

Number n should be greater than k, n>k,

like n=10 and k=3, or n=8 and k=2.

  a) If car dealer has n different models of car and

each model goes in k different colors, in how many ways

you can choose your car?

  b) In how many ways can you fill in k vacant positions

if you have n candidates (n>k). Order of selection makes a

difference, use formula for permutations.  

  c) In how many way can you select k books out of n books

on the shelf. Order of selection doesn't matter, use formula for combinations