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PERMUTATIONS AND COMBINATIONS, I PU MATHEMATICS, Time: 20 minutes, PART - A, I., 1., 2., 3., II., 4., 5., , Answer ALL the following questions., 3 × 1 =3, Given 5 flags of different colours how many different signals can be made if each signal requires the, use of 2 flags, one below the other., 1 1 x, If   then find x., 6! 7! 8!, 8!, Compute:, ., 6!  2!, PART - B, Answer ALL the following questions., 2 × 2 =4, In how many ways can a team of 3 boys and 3 girls be selected from 5 boys and 4 girls., Find the number of ways of selecting 9 balls from 6red balls, 5white balls and 5blue balls such that, the selection consists of 3balls of each colour., PART - C, , III., 6., IV., 7., , Answer ALL the following questions., Determine n if 2nC3: nC2 = 12 : 1., , 1×3=3, , PART - D, Answer ALL the following questions., 1×5=5, What is the number of ways choosing four cards from a pack of 52 playing cards . In how many of, these i) Four cards of the same suit, ii) are face cards, iii) two red and two black card, iv) cards are of the same colour.