You have been asked to judge an art contest with 10 entries. In how many ways can you assign 1st , 2nd and 3rd place? How many words can be made from rearrangements of the word BANANA? You arranged a group date for you and your 3 friends, together with your partners, In how many ways can these 4 couples be seated in a round table if : a) each person can take any seat? b) couples are supposed to seat together