Permutations and Combinations Questions And Answers.


1.Three flags each of different colours are available for a military exercise, Using these flags different codes can be generated by waving.

I. Single flag of different colours

II. Any two flags in a different sequence of colours.

III. three flags in a different sequence of colours.

The maximum number of codes that can be generated is.

A. 6
B. 9
C. 15
D. 18

2.A question paper consists of five problems, each problem having three internal choices. In how many ways can a candidate attempt one or more problems?
A. 63
B. 511
C. 1023
D. 15

3.In a class there are 20 boys and 25 girls. In how many ways can a boy and a girl be selected?
A. 400
B. 500
C. 600
D. 20

4.In how many ways can three consonants and two vowels be selected from the letters of the word �TRIANGLE�?
A. 25
B. 13
C. 40
D. 30

5.A bag contains nine yellow balls, three white balls and four red balls. In how many ways can two balls be drawn from the bag?
A. ?C?
B. �C?
C. �?C?
D. ��C?