In: Statistics and Probability
Use the Basic Counting Law, Permutations, or Combinations to answer the following:
1.) eleven drugs have been found to be effective in the treatment of a disease. it is believed that the sequence in which the drugs are administered is important in the effectiveness of the treatment. In how many ways can 5 of the 11 drugs be administered?
Here order of selection is important, so we will use permutation.
Number of ways to select 5 out of 11 = 11P5 = 11! / (11 - 5)! = 55440