This video lecture from Permutation, Combination and Probability (F.Sc. first year Mathematics) covers: Question numbers 1-4 of exercise 7.3. In these questions we find the number of arrangements of letters of the given words using circular permutation. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.