If there are 12 persons in a party and each of them shakes hands with each other, how many handshakes do happen in the party?
A). 77
B). 66
C). 44
D). 55
66
NA
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1. A box contains 4 red, 3 white and 2 blue balls. Three balls are drawn at random. Find out the number of ways of selecting the balls of different colours?
2. In how many ways 8 persons can sit around a round dining table in such a manner that all will not have the same neighbors in any two arrangement?
3. Find the value of 12p2, 9p1, 8p8?
4. In how many different ways can 5 girls and 5 boys form a circle such that the boys and the girls alternate?
5. How many 6 digit number can be formed from the digits 1, 2, 3, 4, 5, 6 which are divisible by 4 and digits are not repeated?
6. How many different words can be formed with the letters of the word EQUATION without changing the relative order of the vowels and consonants?
7. If the letters of the word CHASM are rearranged to form 5 letter words such that none of the word repeat and the results arranged in ascending order as in a dictionary what is the rank of the word CHA
8. How many different four letter words can be formed (the words need not be meaningful using the letters of the word "MEDITERRANEAN" such that the first letter is E and the last letter is R?
9. Everybody in a room shakes hands with everybody else. The total number of hand shakes is 66. The total number of persons in the room is ?
10. A family consist of a grandfather, 5 sons and daughter and 8 grandchildren. They are to be seated in a row for dinner. The grandchildren wish to occupy the 4 seats at each end and the grandfather refu
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