CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Permutation

Find the numb...

Question

Find the number of ways of arranging six persons (having A, B, C and D among them) in a row so that A, B, C, and D are always in order ABCD (not necessarily together).

Open in App

Solution

Choosing four position out of 6 and putting A B C D in order
_ _ _ _ _ _
A,B,c,D
Number of ways = ${6_{C}}_{4} \times 2! = 30$

Suggest Corrections

thumbs-up

0

Similar questions

Q. The number of ways in which 6 boys and 6 girls are arranged in a row so that no two boys sit together and always row start with the boy is

Q. The number of ways in which six + signs and four – signs can be arranged in a row so that no two – sings occur together is

Q. The number of ways in which six + signs and four – signs can be arranged in a row so that no two – sings occur together is

Q. The number of different ways in which

8

persons can stand in a row so that between two particular persons

A

B

there are always two persons, is

4

3

girls. Arrange the following in ascending order.
a. Number of ways to arrange them in a row
b. Number of ways to arrange them around a table
c. Number of ways to arrange them in a row such that no two girls are together.
d. Number of ways to arrange them around at a table such that all

3

girls are together

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Permutations

MATHEMATICS

Watch in App

explore_more_icon

Explore more

Standard XII Mathematics

Join BYJU'S Learning Program

CrossIcon