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

If set A={(r,s) | r,sW}, then the number of element(s) in set A such that 5Cr 6Cs=1 is

A
0
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
3
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
4
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D 4
Given : 5Cr 6Cs=1
We know, nCrN
Solution is possible only if 5Cr= 6Cs=1
5Cr=1 and 6Cs=1
r=0,5 and s=0,6

Possible pairs (0,0),(0,6),(5,0),(5,6)
Number of elements in set A=4

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon