CAT Quantitative Ability Questions | CAT Permutation, Combination and Probability questions
CAT/2000
Question . 47
There are three books on table A which has to be moved to table B. The order of the book on Table A was 1, 2, 3, with book 1 at the bottom. The order of the book on table B should be with book 2 on top and book 1 on bottom. Note that you can pick up the books in the order they have been arranged. You can’t remove the books from the middle of the stack. In how many minimum steps can we place the books on table B in the required order?
View Answer
Explanatory Answer
Method of solving this CAT Quantitative Ability Question from Permutation, Combination and Probability question
(d) First step — take book 3 to the table B and, second step — put the book 2 on top of 3. Third step — Transfer the arrangement and keep it over book 1 on table A. The last step is transfer the whole arrangement to the table B which is the fourth step to take. Thus total 4 steps are required.