wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

The number of ways in which 8 beads of different colours be strung in a necklace is

A
2520
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
2880
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
4320
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
5040
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 2520
Here 7 beads of different colors taken all at a time can be arranged in (81)!=7! ways along a circle.
Further in the case of formation of necklace, the clockwise and anti - clockwise arrangements are same.
Hence, the required numbers formed =12×7!=12(5040)=2520

flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Introduction
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon