1) How many 3 digit nos can be formed from the digits 1,2,3,4,5,6 if the digits can be repeated? a) 144 b) 108 c) 288 2) How many 4 letter code can be formed using the first 10 digit letters of the english alphabet, if no letter can be repeated?? a) 5400 b) 5004 c) 5040 3) A bag contains 5 black and 6 red balls.Determine the number of ways in which 2 black and 3 red balls can be selected? a) 200 b) 240 c) 120 4) Determine the number of ways of selecting 9 balls from 6 red balls,5 white balls and 5 blue balls if each selection consists of 3 balls of each colour? a) 1600 b) 2000 c) 2400 5) In how many ways can the letters of the word ASSASSINATION be arranged so that all the S's are together? a) 115020 b) 151200 c) 151002 6) It is required to seat 5 men and 4 women in a row so that the women occupy even places.How many such arrangements are possible? a) 2080 b) 2800 c) 2880

Permutation & Combination

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